Numerical Ability

Question.no.117


If (9)^2 is subtracted from a square of a number , the value so obtained is 544..
what is the number..?
1)25
2)26
3)32
4)27
5)none




Answer..


(9)^2=81+544=625
625=25^2


1)25

Numerical Ability

Question.no.116
What wil come in place of both the question marks (?) in the following equation ?
(X^2/108)=(16/X)..

1)18
2)16
3)12
4)24
5)none

Note : X=? and X^2=X power 2


Answer..

(X^3)=108*16
(X^3)=1728
(12^3)=1728
X=12

3)12

NUMERICAL ABILITY

Question.no.115

What least number should be subtracted from 9889 to make it perfect square ?

1)84

2)88

3)108

4)74

5)none of these

Answer...

2)88

9889-88=9801

9801/4=2450.25

NOTE:

Perfect square at least number...