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MATH REVISION

Authored by sujatha selvan

Mathematics

9th Grade

Used 5+ times

MATH REVISION
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3√6 + 4√6 is equal to:

6√6

7√6

4√12

7√12

Answer explanation

3√6 + 4√6 = (3 + 4)√6 = 7√6

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The number obtained on rationalising the denominator of 1/ (√7 – 2) is

(√7+2)/3

(√7-2)/3

(√7+2)/5

(√7+2)/45

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

One of the linear factors of 3x2+8x+5 is

(x-4)

(x+2)

(x-2)

(x+1)

Answer explanation

3x2+8x+5 = 3x2+ 3x+5x+5 

3x2+8x+5 = 3x(x+1)+5(x+1)

3x2+8x+5 = (3x+5)(x+1)

Therefore, (x+1) is one of the factors of 3x2+8x+5.

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

If the perpendicular distance of a point P from the x-axis is 7 units and the foot of the perpendicular lies on the negative direction of x-axis, then the point P has:

y-coordinate = 7 or –7 only

y-coordinate = 7 only

y-coordinate = –7 only

x-coordinate = –7

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Abscissa of all the points on the x-axis is

0

1

2

ANY NUMBER

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The linear equation 3x-11y=10 has:

Unique solution

Two solutions

Infinitely many solutions

No solutions

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y = k.

5

6

7

8

Answer explanation

2x + 3y = k

k=2(1)+3(2) = 2+6 = 8

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