8
Q:

# What should come in place of both the question marks in the equation$?128=162?$

 A) 12 B) 14 C) 144 D) 196

Explanation:

Let $x128=162x$

Then,

$∴x=12$

Q:

Cube root of 729 then square it

 A) 9 B) 36 C) 81 D) 144

Explanation:

729 = 9 x 9 x 9

=> Cube root of 729 = 9

Now, required square of 9 = 9 x 9 = 81.

0 236
Q:

If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number?

 A) 5.65 B) 2.7 C) 3.5 D) 6.66

Explanation:

Let the number is = x

(89)2 + x2 = 16202

x2 = 8281

x = 91

=> (1/26) of 91 = 3.5

11 1064
Q:

What should come in place of x in the following equation?

 A) 13 B) 12 C) 17 D) 16

Explanation:

Then x2 = $162x128$

= Sqrt of 82 x 62 x 32

= 8 x 6 x 3

x2  = 144.

x  = 12.

5 619
Q:

Find the value of $1.21x0.91.1x0.11$?

 A) 0 B) 1 C) 3 D) 5

Explanation:

Given   $1.21x0.91.1x0.11$

$1.21x100x0.9x101.1x10x0.11x100$

$9$

= 3.

6 946
Q:

If  then find the value of $x3-6x2+6x$ ?

 A) 1 B) 2 C) 3 D) 4

Explanation:

Given that

So x - 2 =

Now cubing on both sides, we get

=>

Therefore,

5 782
Q:

If

 A) 3/4 B) 4/3 C) 3/5 D) 5/3

Explanation:

By simplifying, we get 4/3

3 1181
Q:

If x =

 A) 3sqrt{3} B) 8sqrt{3} C) 14 D) 14+8sqrt{3}

Explanation: