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Q:

# The sum of two numbers is 90 and their difference is 30. What is the difference of their squares?

Answer:
Q:

What approximate value will come in place of the question mark(?) in the below question?

(47% of 1442  - 36% of 1412) + 63 = ?

 A) 4 B) 5 C) 3 D) 6

Answer & Explanation Answer: C) 3

Explanation:
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13 1172
Q:

In the following question a number series is given which has only one wrong number. You have to find out the wrong number?

7.5  47.5  87.5  157.5  247.5  357.5  487.5

 A) 47.5 B) 87.5 C) 247.5 D) 357.5

Answer & Explanation Answer: A) 47.5

Explanation:
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13 590
Q:

40 % of 250 = 50% ?

 A) 200 B) 100 C) 150 D) 400

Answer & Explanation Answer: A) 200

Explanation:

As per given

$\inline \frac{40}{100}\times 250=\frac{50}{100}\times x$

$\inline \Rightarrow x=200$

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4 406
Q:

243 has been divided into three parts such that half of the first part, one - third of the second part and one - fourth of the third part are equal. The largest part is ?

Answer

$\inline \frac{A}{2}=\frac{B}{3}=\frac{C}{4}=x$

$\inline&space;\Rightarrow$ A = 2x,   B = 3x,  C = 4x

$\inline&space;\Rightarrow$ A : B : C = 2 : 3 : 4

$\inline&space;\therefore$ Largest part = $\inline 243\times \frac{4}{9}=108$

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1992
Q:

If the difference between the biggest and smallest numbers of a three consecutive numbers is one-eight of the middle number. Then Find the greatest number of the three numbers?

Answer

Let the Numbers be  x, x+1 and x+2

Then $\inline x+2-x=\frac{x+1}{8}$

$\inline \Rightarrow 2=\frac{x+1}{8}$

$\inline \Rightarrow x+1=16$

x = 15

$\inline&space;\therefore$ Greatest number = x + 2 = 15 + 2 = 17

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338