Question 1

28?+1426=34 of 2872

Accepted Answer

L e t 28 x + 1426 = 3 × 718 Then 28 x = 2154 - 1426 ⇒ 28 x = 728 ⇒ x = 26 ∴ x = 676

Question 2

Find the value of 1.21x0.91.1x0.11 ?

Accepted Answer

Given 1 . 21 x 0 . 9 1 . 1 x 0 . 11 = 1 . 21 x 100 x 0 . 9 x 10 1 . 1 x 10 x 0 . 11 x 100 = 9 = 3.

Question 3

If x×y = x + y + xy , the value of 6x24 is:

Accepted Answer

G i v e n x × y = x + y + x y H e r e x = 6 , y = 24 T h e n , x × y = 6 + 24 + 6 x 24 6 x 24 = 30 + 144 = 30 + 12 = 42 .

Question 4

What should come in place of x in the following equation? x 128 = 162 x

Accepted Answer

12

Question 5

0.204×420.07×3.4 is equal to:

Accepted Answer

0 . 204 × 42 0 . 07 × 3 . 4 = 8568 238 = 36 = 6

Question 6

(0.75)31-0.75+0.75+0.752+1 = ?

Accepted Answer

( 0 . 75 ) 3 1 - 0 . 75 + 0 . 75 + ( 0 . 75 ) 2 + 1 = ( 0 . 75 ) 3 + ( 1 - 0 . 75 ) ( 1 ) 2 + ( 0 . 75 ) 2 + 1 × 0 . 75 1 - 0 . 75 = ( 0 . 75 ) 3 + ( 1 ) 3 - ( 0 . 75 ) 3 1 - 0 . 75 = 1 0 . 25 = 4 = 2

Question 7

If a = 5 + 15 - 1 b = 5 - 15 + 1 then find the value of a2+ab+b2a2-ab+b2 is ::

Accepted Answer

By simplifying, we get 4/3

Question 8

326-3-436-2-68-12=?

Accepted Answer

Given Exp = 3 2 6 - 3 × 6 + 3 6 + 3 - 4 3 6 - 2 × 6 + 2 6 + 2 - 6 2 2 - 3 = 3 2 ( 6 + 3 ) 6 - 3 - 4 3 ( 6 + 2 ) 6 - 2 + 3 3 - 2 × 3 + 2 3 + 2 = 2 6 + 3 - 3 6 + 2 + 3 3 + 2 = 12 + 6 - 18 - 6 + 3 3 + 3 2 = 5 3

Question 9

Cube root of 729 then square it

Accepted Answer

729 = 9 x 9 x 9 => Cube root of 729 = 9 Now, required square of 9 = 9 x 9 = 81.

Question 10

What is the value of 729+72.9+7.29

Accepted Answer

38.23

Question 11

What is the value of 361+3.61+0.0361 ?

Accepted Answer

21.09

Question 12

If 1-aa3+9 = 19 - a1-a3 , then what is the value of a?

Accepted Answer

1/10, 9/10

Question 13

If a is positive and a2+1a2 = 7, then a3 + 1a3 = ?

Accepted Answer

18

Question 14

What is the remainder, when 4x4 +10x3-20x2+90 is divided by (x+2) ?

Accepted Answer

-6

Question 15

Determine the value of 1r+1s when r3+s3=0 and r+s=6 ?

Accepted Answer

0.5

Question 16

Which of the numbers given below is the square root of 14161?

Accepted Answer

119

Question 17

Which of the numbers given below is the square root of 15376?

Accepted Answer

124

Question 18

Which of the following numbers will have an irrational square root?

Accepted Answer

2048

Question 19

The simplified form of (4x + 3)2 . (3x - 5) - (4x3 - 12x2 + 9x - 20) is

Accepted Answer

44x3 + 4x2 - 102x - 25

Question 20

If x+1x=-2, then the value of x7+1x7

Accepted Answer

-2

Square Root and Cube Root Questions