Quiz about IGCSE Unit 1 Chapter 2 Summary questions

Question 1

Write an expression in terms of n for:

The sum of a number and 12

Accepted Answer

n + 12

Answer

12n

Answer

n - 12

Answer

12 - n

Question 2

Write an expression in terms of n for:

Twice a number minus four

Accepted Answer

2n - 4

Answer

2n + 4

Answer

2(n - 4)

Answer

2(n + 4)

Question 3

Write an expression in terms of n for:

A number multiplied by x and then squared

Accepted Answer

(nx)2

Answer

x2 x n

Answer

n2 x x

Answer

n2 x x

Question 4

Write an expression in terms of n for:

The square of a number cubed.

Accepted Answer

(n2)3

Answer

(n)2

Answer

(n3)2

Answer

(n)3

Question 5

Simplify:

$$9xy+3x+6xy\ -2x$$

Accepted Answer

$$15xy\ +\ x$$

Answer

$$18xy$$

Answer

$$15xy\ +\ 5x$$

Answer

$$3xy\ +\ x$$

Question 6

Simplify $$\frac{a^3b^4}{ab^3}$$

Accepted Answer

$$a^2b$$

Answer

$$a^4b^7$$

Answer

$$ab^4$$

Answer

$$\frac{a^3b^4}{ab^3}$$

Question 7

Simplify $$2\left(x^3\right)^2$$

Accepted Answer

$$2x^6$$

Answer

$$4x^6$$

Answer

$$2x^5$$

Answer

$$x^{12}$$

Question 8

Simplify $$3x\ imes2x^3\ imes y^2$$

Accepted Answer

$$6x^4y^2$$

Answer

$$12x^3y^2$$

Answer

$$5x^4y^2$$

Answer

$$3x^5y^2$$

Question 9

Simplify $$\left(4ax^2\right)^0$$

Accepted Answer

$$1$$

Answer

$$0$$

Answer

$$4a$$

Answer

$$16a^2x^4$$

Question 10

$$4x^2y imes x^3y^2$$

Accepted Answer

$$4x^5y^3$$

Answer

$$0$$

Answer

$$8x^5y^3$$

Answer

$$4x^2y^5$$

Question 11

What is the value of x, when $$2^x=32$$

Accepted Answer

5

Answer

3

Answer

4

Answer

6

Question 12

$$3^x=\frac{1}{27}$$

Accepted Answer

-3

Answer

3

Answer

2

Answer

-1

Question 13

Expand the expression and simplify if possible.

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

Accepted Answer

8x - 4

Answer

8x + 4

Answer

8x - 2

Answer

5x + 4

Question 14

Expand the expression and simplify if possible.

$$5x\left(x+7y\right)-2x\left(2x-y\right)$$

Accepted Answer

$$x^2+37xy$$

Answer

$$3x^2+37xy$$

Answer

$$7x^2+3xy$$

Answer

$$5x^2+7xy$$

Question 15

Find the value of $$\left(x+5\right)-\left(x-5\right)$$ when $$x=1$$

Accepted Answer

10

Answer

0

Answer

2

Answer

5

Question 16

Find the value of $$\left(x+5\right)-\left(x-5\right)$$ when $$x=0$$

Accepted Answer

10

Answer

-5

Answer

5

Answer

0

Question 17

Find the value of $$\left(x+5\right)-\left(x-5\right)$$ when $$x=5$$

Accepted Answer

10

Answer

15

Answer

25

Answer

0

Question 18

Simplify and write the answer with positive indices only. $$x^5 imes x^{-2}$$

Accepted Answer

$$x^3$$

Answer

$$x^7$$

Answer

$$x^{-7}$$

Answer

$$x^{-3}$$

Question 19

Simplify and write the answer with positive indices only. $$\frac{8x^2}{2x^4}$$

Accepted Answer

$$\frac{4}{x^2}$$

Answer

$$4$$

Answer

$$4x^2$$

Answer

$$16x^6$$

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