REVIEW - GRADE 8

​REVIEW SESSIONS

By Rodley Lina

Multiple Choice

The mode is the number ________________________.

• you see most

• you see least

• you don't see

• you see first

Multiple Choice

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10

• 13
• 12
• 11
• 10

Multiple Choice

Find the mean of these numbers:
2, 57, 38, 42, 6

• 29
• 38
• 50
• 145

Multiple Choice

Find the median of these numbers:
4,2,7,4,3

• 2
• 5
• 7
• 4

Multiple Choice

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean
• Median
• Mode
• Range

Multiple Choice

To find the ________ you put all numbers in order from least to greatest and find the number that is in the middle.

• Mean
• Median
• Mode
• Range

Multiple Choice

Find the median.
12, 5, 9, 18, 22, 25, 5

• 9
• 8
• 12
• 18

Multiple Choice

A data set can have more than one median?

• True
• False

Multiple Choice

Find the Mean of:
8, 14, 32, 6, 15

• 15
• 175
• 75
• 12

Multiple Choice

What is the mode?

• # happening the most
• the average
• biggest - smallest
• the middle #

Multiple Choice

What is another word for mean?

• median

• average

• mode

• sum

• quotient

Multiple Choice

What is the median of the data below?

20 , 3 , 17 , 1 , 5

• 5

• 17

• 19

• 9.2

Multiple Choice

In the data set below, which measure of center would best describe the data?

0 , 1 , 0 , 14 , 1 , 0 , 0 , 0 , 0 , 2 , 0 , 0 , 0

• the median

• the mode

• the mean

• this answer is impossible to know

Multiple Choice

The height of three basketball players is 210 cm, 220 cm and 191 cm.
What is their average height?

• 210
• 207
• 220
• 200

Multiple Choice

Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have.
1,0,1,5,6,3,4

• 3.33
• 2.85
• 3
• 3.5

Multiple Choice

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5
• 6
• 9
• 11

Multiple Choice

The number of miles that Jenna cycled each week for a 7-week period is shown: 
36, 42, 28, 52, 48, 36, 31 
What is the median number of miles Jenna cycled?

• 24
• 36
• 39
• 52

Multiple Choice

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 99 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 50
• A score of 91 was slightly below average.

Multiple Choice

The mean of five numbers is 8.2.

Four of the numbers are 8, 10, 12 and 10.

Work out the fifth number.

• 10

• 11

• 1

• 3

Multiple Choice

(x + 2)(x + 4)

• $$x^2+\ 6x\ +\ 8$$

• $$x^2+\ 8x\ +\ 6$$

• $$x^2+\ 6x\ +\ 8$$

• $$x^2+\ 8x\ +\ 8$$

Multiple Choice

Which of the following is a special product?

• $$x^2\ -\ 4$$  

• $$x^2\ +\ 4$$  

• $$4x^2\ +\ 3$$  

• $$2x\ +\ 1$$  

Multiple Choice

(5x + 2)³

• 25x³ + 35x² + 40x + 8

• 125x³ + 150x² + 60x + 8

• 125x³ + 90x² + 30x + 8

• 125x³ + 8

Multiple Choice

(3x - 5)(9x² + 15x + 25)

• 27x³ + 45x² + 75x - 125

• 27x³ +90x - 54x - 125

• 27x³ + 125

• 27x³ - 125

Multiple Choice

On the special products of a "Bimomial times a Trinomial", which term in the trinomial is wrong and what should be the correct term to get the indicated answer?

(3x - 5)(9x² + 15x - 25)

• First term, it should be 6x².

• Second term, it should be -15x.

• Third term, it should be +25.

• All the terms are already correct. No need to change.

Multiple Choice

Which of the following is a perfect square and at the same time a perfect cube?

• 0

• 1

• 65

• 178

Multiple Choice

(2u-4v)²

• 4u²-8uv+16v²
• 4u²-16uv+16v²
• 4u²-16v²
• 4u²+8uv+16v²

Multiple Select

Select all polynomials that can be factored.

• x + 1

• x² - 49

• 2x³ - 6x² + 8x

• x² + 3x + 2

Multiple Choice

If ax² + bx + c = (4x - 5)(5x + 6), what is the value of b?

• 10

• 20

• -30

• -1

Multiple Choice

Which of the following pairs is the correct factor of the trinomial

x² + x - 12 ?

• (x + 3) (x - 4)

• (x - 3) (x + 4)

• (x + 6) (x - 2)

• (x - 6) (x + 2)

Multiple Choice

What is the product of (x – 3)(x² + 3x + 9)?

• x³ + 27

• x³ – 6

• x³ – 27

• x³ + 6

Multiple Choice

What is the missing term of (3g – 5)² = (9g2 - ____ + 25)?

• 10g

• 20g

• 30g

• 40g

Multiple Choice

If (y – 6) is one of the factors of y³ – 216, what is the other factor?

• (y² +6y –36)

• (y² –6y + 36)

• (y² – 6y –36)

• y² + 6y + 36)

Multiple Choice

Find the missing term: (x + ___) (3x + ___) = 3x² + 27x + 24

• 6 , 4

• 4 , 6

• 8 , 3

• 12 , 2

Multiple Choice

One of the factors of 2a² + 5a – 12 is a + 4. What is the other factor?

• 2a + 3

• 2a - 8

• 2a - 3

• 2a + 8

Multiple Choice

(7y-6x³)(-7y-6x³)

• 36x⁶+84x³y+49y²
• 36x⁹+84x³y+49y²
• 36x⁶-49y²
• 36x⁶+42x³y+49y²

Multiple Choice

What is the pattern for a cube of a binomial?

• a³+3ab+3ba+b³

• a³+3a²b+3ab+b³

• a³+3a²b²+3ab+b³

• a³+3a²b+3ab²+b³

Multiple Choice

What are the factors of
25x² - 81?

• (5x - 9)(5x + 9)
• (5x - 9)(5x - 9)
• (5x + 9)(5x + 9)
• Cannot be factored

Multiple Choice

What do you call a polynomial that cannot be factored?

• Simplified

• FOIL

• Proper

• Prime

Multiple Choice

What method should you use to factor the polynomial?

8r³ - 16r²

• Factor by Grouping

• Factor out the GCF

• Difference of Squares

• Master Product

Multiple Choice

Factor:

$$10x³-15x$$  

• $$x(10x²-15)$$  
  

• $$5x(2x²-3)$$  
  

• $$5(2x³-3x)$$  
  

• $$5x²(10x-3)$$  
  

Multiple Choice

Factor:

$$28x^2\ +\ 7x\ +\ 28$$  

• $$x\left(28x+7+4\right)$$  

• $$7x\left(4x+x+4\right)$$  

• $$7\left(4x+x+4\right)$$  

• $$7\left(4x-x+4\right)$$  

Multiple Choice

What is the common monomial factor of

$$28x^4y^3-21xy^4+63xy^9$$  

• $$7xy^3$$  

• $$7xy$$  

• $$7x^2y^2$$  

• $$7x^2y^3$$  

Multiple Select

Mark check if the expression is a difference of two squares.

• $$c^2-18$$

• $$81x^4-169y^2$$

• $$25x^2y^4+16$$

• $$m^{14}-y^{12}$$

Multiple Choice

Factor:

$$10x^3-3x^2y+6xy^2$$  

• $$2x\left(5x^3-xy+3xy^2\right)$$  

• $$xy\left(10x^2-3x+6y\right)$$  

• $$x\left(10x^2+3xy-6y^2\right)$$  

• $$x\left(10x^2-3xy+6y^2\right)$$  

Multiple Choice

Factor:

$$3m^4-12$$  

• $$\left(m^2-2\right)^2$$  

• $$3\left(m^2+2\right)\left(m^2-2\right)$$  

• $$\left(3m^2-6\right)\left(3m^2+6\right)$$  

• $$3\left(m^2+4\right)^2$$  

Multiple Choice

Factor:

$$18x^4-50$$  

• $$2\left(3x^2+5\right)\left(3x^2-5\right)$$  

• $$2\left(x^2+5\right)\left(x^2-5\right)$$  

• $$2\left(-3x^2+5\right)\left(3x^2-5\right)$$  

• $$2\left(3x^2+25\right)^2$$  

Multiple Choice

Factor:  $$8m^4+6m^3-m$$  

• $$m^2\left(8m^3+6m^2-1\right)$$  

• $$m\left(m^2+2m-1\right)$$  

• $$m\left(8m^3+6m^2-1\right)$$  

• $$m^2\left(8m^4+6m^2-m\right)$$  

Multiple Choice

Factor:  $$16-x^4y^2$$  

• $$\left(4+xy\right)\left(4-xy\right)$$  

• $$\left(8+x^2y\right)\left(8-x^2y\right)$$  

• $$\left(8+xy\right)\left(8-xy\right)$$  

• $$\left(4+x^2y\right)\left(4-x^2y\right)$$  

Multiple Choice

Factor:  $$25u^4-9v^4$$  

• $$\left(5u^2-3v^2\right)^2$$  

• $$\left(5u^2+2v^2\right)\left(5u^2-2v^2\right)$$  

• $$\left(25u^2+9v^2\right)^2$$  

• $$\left(5u^2+3v^2\right)\left(5u^2-3v^2\right)$$  

Multiple Choice

What method should you use to factor the polynomial?

x² - 36

• Factor by Grouping

• Factor out the GCF

• Difference of Squares

• Master Products

Multiple Choice

8r³ - 16r²

• 4r²(2r - 4)

• 8r²(r - 2)

• 8(r³ - r²)

• 4(r³ - 2r²)

Multiple Choice

Factor

n² + 16n + 63

• (n-7)(n+4)

• (n+7)(n-9)

• (n-3)(n-10)

• (n+7)(n+9)

Multiple Choice

Factor Completely:

x² - 36

• (x + 9)(x - 4)

• (x - 6)(x - 6)

• (x - 9)(x + 4)

• (x + 6)(x - 6)

Multiple Choice

What is the factored form of 5n³-10n²+3n-6

• (5n²+3)(n-2)

• (5n²-3)(n-2)

• (5n³+3)(n-2)

• 10n(n²-6)

Multiple Choice

Factor Completely.
$$4x^2+24x-64$$  

• $$4\left(x+8\right)\left(x-2\right)$$  

• $$4(x^2+6x-16)$$  

• $$4\left(x^2+24x-16\right)$$  

• $$4\left(x-8\right)\left(x+2\right)$$  

Multiple Choice

Factor Completely.
$$8x^2-200$$  

• $$8\left(x+5\right)\left(x-5\right)$$  

• $$8\left(x^2-25\right)$$  

• $$4\left(2x^2-50\right)$$  

• $$4\left(2x+25\right)\left(2x-25\right)$$  

Multiple Choice

Which of the following is one of the factors of the expression: $$4x^2-25?$$  

• $$\left(4x-5_{ }\right)$$  

• $$\left(2x+1\right)$$  

• $$\left(4x-1\right)$$  

• $$\left(2x-5\right)$$  

Multiple Choice

Which is a factor of $$x^2-11x+24?$$  

• $$\left(x+3\right)$$  

• $$\left(x-3\right)$$  

• $$\left(x+4\right)$$  

• $$\left(x-4\right)$$  

Multiple Choice

What is the factored form of the expression? $$x^2-16$$  

• $$\left(x-4\right)\left(x+4\right)$$  

• $$\left(x-8\right)\left(x+8\right)$$  

• $$\left(x-4\right)\left(x-4\right)$$  

• $$\left(x-8\right)\left(x-8\right)$$  

Multiple Choice

Which shows the polynomial $$8x^2+16x+8$$  completely factored?

• $$\left(4x+4\right)^2$$  

• $$\left(4x+4\right)\left(2x+2\right)$$  

• $$8\left(x+1\right)^2$$  

• $$8\left(x+1\right)\left(x-1\right)$$  

Multiple Choice

What is the factored form of the expression? $$x^2+x-6$$  

• $$\left(x-3\right)\left(x+2\right)$$  

• $$\left(x+1\right)\left(x-6\right)$$  

• $$\left(x-2\right)\left(x+3\right)$$  

• $$\left(x-2\right)\left(x-3\right)$$  

Multiple Choice

If $$\left(x-3\right)$$  is a factor of  $$x^2+x-12$$  , then the other factor is?

• $$\left(4x-3\right)$$  

• $$\left(3x-4\right)$$  

• $$\left(x-4\right)$$  

• $$\left(x+4\right)$$  

Multiple Choice

Written in factored form, the trinomial $$2y^2+26y+80$$  is equivalent to:

• $$2\left(y-5\right)\left(y-8\right)$$  

• $$\left(2y+5\right)\left(y+8\right)$$  

• $$2\left(y+5\right)\left(y+8\right)$$  

• $$\left(y+5\right)\left(2y+16\right)$$  

Multiple Choice

When factored completely, $$x^3-9x$$  is equivalent to:

• $$x\left(x-3\right)$$  

• $$x\left(x+3\right)\left(x-3\right)$$  

• $$\left(x+3\right)\left(x-3\right)$$  

• $$x\left(x+3\right)$$  

Multiple Choice

Which expression is the factored form of $$2x^2-2x-12?$$  

• $$2\left(x+2\right)\left(x-3\right)$$  

• $$2\left(x+6\right)\left(x-1\right)$$  

• $$2\left(x+3\right)\left(x-2\right)$$  

• $$2\left(x+1\right)\left(x-6\right)$$  

Multiple Choice

Factor the trinomial completely. $$x^2-x-30$$  

• $$\left(x+1\right)\left(x-30\right)$$  

• $$\left(x+5\right)\left(x-6\right)$$  

• $$\left(x+6\right)\left(x-5\right)$$  

• $$prime$$  

Multiple Choice

Factor the trinomial completely.  $$x^2-6x-72$$  

• $$\left(x-12\right)\left(x+6\right)$$  

• $$\left(x-72\right)\left(x+1\right)$$  

• $$\left(x+12\right)\left(x-6\right)$$  

• $$prime$$  

Multiple Choice

Factor the binomial completely.  $$36-25x^2$$  

• $$\left(6-5x\right)^2$$  

• $$\left(6+5x\right)^2$$  

• $$\left(6+5x\right)\left(6-5x\right)$$  

• $$prime$$  

Multiple Choice

What is a method of checking your work when factoring?

• asking the teacher every time

• FOIL

• division

• assume you're correct

Multiple Choice

Factor:

6m + 2n - 14

• 2(3m + n - 7)

• 2m(1 + n - 7)

• 2(3m + n + 7)

• 2m(1 + n + 7)

Multiple Choice

Factor:

60x²y - 3xy

• 3x²y (20x -1)

• 3xy (20x +1)

• 3xy (20x - 1)

• -3xy (20x - 1)

Multiple Choice

Factor:

8x² + 10x + 16xy

• 18x² +16xy

• 2 (4x² + 5 + 8y)

• 2x (4x + 5 + 8y)

• 8x² + 10x + 16xy

Multiple Choice

Factor:

x² + 7x - 30

• (x - 10)(x + 3)

• (x + 10)(x - 7)

• (x + 10)(x - 3)

• (x + 10)(x + 3)

Multiple Choice

Factor:

n² + 5n - 6

• (n - 2)(n - 3)

• (n + 2)(n - 3)

• (n + 1)(n - 6)

• (n - 1)(n + 6)

Multiple Choice

What is the product of (x + 4) (x - 4)?

• x² - 16

• x² - 8

• x² + 16

• x² + 8

Multiple Choice

Multiply (2x + 3) (2x - 3)

• 4x² - 6

• 4x²

• 4x² - 9

• 4x² + 9

Multiple Choice

What is (4x²+5)(4x²-5)?

• 16x⁴ - 25

• 8x⁴ - 10

• 16x² - 25

• 8x² - 10

Multiple Choice

Evaluate:

(5a⁵ - 2b)²

• 25a¹⁰ - 20a⁵b + 4b²

• 25a¹⁰ + 10a⁵b + 10b²

• 10a¹⁰ - 10ab + 4b²

• 25a¹⁰ - 7a⁵b + 4b²

Multiple Choice

Factor

k² - 2k - 24

• (k+6)(k-1)

• (k+4)(k-6)

• (k+4)(k+6)

• (k-4)(k+6)

Multiple Choice

Factor

x² + 9x - 36

• (x + 9)(x - 4)

• (x - 12)(x + 3)

• (x - 9)(x - 4)

• (x + 12)(x - 3)

Multiple Choice

Factor

27x³-64

• (3x+4)(9x²-12x+16)

• (3x+4)(9x²+12x+16)

• (3x-4)(9x²+12x+16)

• (3x-4)(9x²-12x+16)

Multiple Choice

Factor by grouping:

x³+7x²-2x-14

• (x²+2)(x-7)

• (x²-2)(x-7)

• (x²-2)(x+7)

• (x²+2)(x+7)

Multiple Choice

Factor: 8x³ - 1

• (2x - 1)(4x² + 2x + 1)

• (2x + 1)(4x² - 2x + 1)

• (2x + 1)(4x² +2x + 1)

• (2x - 1)(4x² - 2x - 1)

Multiple Choice

Complete the formula:

a³-b³=

• (a+b)(a²+ab+b²)

• (a-b)(a²-ab+b²)

• (a+b)(a²-ab+b²)

• (a-b)(a²+ab+b²)

Multiple Choice

What are the factors of

3x²-17x+10

• (x+5)(3x+2)

• (3x-5)(x-2)

• (x-5)(3x-2)

• (x+5)(3x-2)

Multiple Choice

Factor Completely:

3x² + 18x +15

• 5(x+1)(x+3) 

• 3(x+5)(x+1)

• 3(x-5)(x-1)

• 6(x+3)(x+5)

Multiple Choice

Factor Completely:

x² - 36

• (x - 6)(x - 6)

• (x + 9)(x - 4)

• (x + 6)(x - 6)

• (x - 9)(x + 4)

Multiple Choice

(2x + 1)(2x - 1) = ?

• $$4x^2\ +\ 1$$  
  

• $$2x^2\ +\ 1$$  
  

• $$4x^2\ -\ 1$$  

• $$2x\ +\ 2$$  

Multiple Choice

$$\left(x\ +\ y\right)\left(x^2\ -xy\ +y^2\right)$$  

• $$x^2\ -\ y^2$$  
  

• $$x^2\ +\ y^2$$  
  

• $$x^3\ -\ y^3$$  

• $$x^3\ +\ y^3$$  

Multiple Choice

$$\left(x\right)\left(3x^2\ -2x\ +\ 4\right)$$  

• $$4x^2\ -\ 3x\ +4x$$  
  

• $$3x^3\ -2x^2\ +\ 4x$$  
  

• $$3x^2\ -\ 2x\ +\ 4$$  

• $$x^3\ +\ y^3$$  

Multiple Choice

$$\left(x\ +2\right)\left(2x\ -2\right)\ =\ ?$$  

• $$2x^2+\ 2x\ -\ 4$$  
  

• $$2x^2\ -2x\ +\ 4$$  
  

• $$3x\ -\ 2$$  

• $$x^2\ +\ y^2$$  

Multiple Choice

Which of the following polynomials is a special product?

• $$2x^2+\ 2x\ -\ 4$$  
  

• $$2x^2\ -2x\ +\ 5$$  
  

• $$3x\ -\ 2$$  

• $$x^2\ +\ y^2$$  

Multiple Choice

Which of the following polynomials is a special product?

• $$2x^2-\ 4$$
  

• $$8x^3\ -27$$
  

• $$3x\ -\ 2$$

• $$2x\ +\ y^2$$

Multiple Choice

Which of the following polynomials is a special product?

• $$2x^2-\ 3$$
  

• $$2x^3\ -27$$
  

• $$3x^2\ -\ 4$$

• $$16\ -\ 81x^8$$

Multiple Choice

(x+4)²

• x²+16
• x²-16
• x²+8x+16
• x²+8x-16

Multiple Choice

Which of the choices is a perfect square term?

• b⁵

• x²y⁹

• a¹⁰k¹²o¹⁸

• r⁷y⁶

Multiple Choice

Which of the following is a perfect square and a perfect cube term?

• 0

• 64

• 73

• 81

Multiple Select

What are the factors of 81?

• 27 x 3

• 7 x 8

• 9 x 9

• 81 x 1

• 12 x 8

Multiple Choice

What is the acronym that works with multiplying binomials?

• FIOL

• FOOL

• FOLL

• FOIL

Multiple Choice

$$Simplify.\ \ \left(6x-4\right)^2$$  

• $$36x^2-24x+16$$  

• $$24x^2-24x-16$$  

• $$6x^2-24x-16$$  

• $$36x^2-48x+16$$  

Multiple Choice

What is the product of this binomial difference?

$$\left(a-b\right)^2$$  

• $$a^{2\ }-b^2$$  

• $$a^2+2ab+b^2$$  

• $$a^2-2ab+b^2$$  

• $$\frac{n\left(n+2\right)}{2}$$  

Multiple Choice

$$\left(x-2\right)^2$$  

• $$x^2+\ 4x\ +\ 4$$  

• $$x^2-\ 4x\ -\ 4$$  

• $$x^2-\ 4x+\ 4$$  

• $$x^2+\ 4x\ -\ 4$$  

Multiple Choice

$$3x\left(7x-9\right)$$  

• $$21x\ -\ 27x$$  

• $$21x^2-\ 27x$$  

• $$21x\ -\ 27x^2$$  

• $$21x^2\ -\ 27x^2$$  

Multiple Choice

Which of the following is a factor of

$$12x^2\ +9x$$  ?

• $$6x^2$$  

• $$2x$$  

• $$3x$$  

• $$3x^2$$  

Multiple Choice

Which of the following are the factors of

$$6x^2+\ 17x\ +\ 5$$  ?

• $$\left(2x\ +\ 1\right)\left(3x\ +\ 5\right)$$  

• $$\left(3x\ +\ 1\right)\left(2x\ +\ 5\right)$$  

• $$\left(x\ +\ 3\right)\left(5x\ +\ 2\right)$$  

• $$\left(3x\ +\ 1\right)\left(2x\ +\ 5\right)$$  

Multiple Choice

Factor the expression

$$9x^5-12x^{3\ }+\ 6x^4$$  

• $$3x^3\left(3x^2-\ 4\ +\ 2x\right)$$  

• $$6x^3\left(3x^2-\ 4\ +\ 2x\right)$$  

• $$3x^3\left(6x^2-\ 4\ +\ 2x\right)$$  

• $$3x^3\left(3x^2-\ 4\ +\ 3x\right)$$  

Multiple Choice

It is a polynomial expression consists of two terms.

• Monomial

• Binomial

• Trinomial

• Multinomial

Multiple Choice

Which of the following polynomials is a trinomial?

• $$x^3-\ 3$$

• $$x^{2\ }-\ 2x\ +\ 2$$

• $$45x^2$$

• $$7x^{3\ }-\ x^2\ +\ 9x\ -\ 3$$

Multiple Choice

$$\left(6x\right)\left(3x\right)$$  

• $$9x$$  

• $$9x^2$$  

• $$18x$$  

• $$18x^2$$  

Multiple Choice

At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the MODE.

12,10,10,10,13,12,11,13,10

• 10

• 12

• 10 and 12

• No Mode

Multiple Choice

What is the mode of the following data set?

5, 7, 7, 8, 12 , 12, 5, 6, 13, 12

• 5

• 7

• 12

• no mode

Multiple Choice

The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?

• 99 was the highest score on the test.
• More students received a 94 than any other score
• No student scored below a 50
• A score of 91 was slightly below average.

Multiple Choice

1, 2, 2, 3, 7 - What is the mode?

• 1

• 2

• 3

• 7

Multiple Choice

Find the mean of the numbers below:

4, 9, 7, 10, 5

• 5

• 6

• 7

• 8

Multiple Choice

Find the mean of the numbers below:

20, 30, 24, 32

• 26.5

• 27.5

• 27

• 27.5

Multiple Choice

The mean of four numbers is 10.

Three of the numbers are 9, 11 and 7.

Work out the fourth number.

• 9

• 13

• 11

• 15

Multiple Choice

The mean of five numbers is 8.2.

Four of the numbers are 8, 10, 12 and 10.

Work out the fifth number.

• 10

• 11

• 1

• 3

Multiple Choice

What is the definition of the mean?

• The average
• The middle number
• The difference between the highest and lowest numbers
• The number that occurs the most