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Number System

Number System
What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361

11
321
225
121

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The series is (Prime No.)²So it is (11)² = 121

Number System
Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:

15
11
13
9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the three integers be x, x + 2 and x+ 4.Then,3x = 2(x + 4) + 3x = 11Third integer = x + 4 = 15.

Number System
What should be the least number to be added to the 51234 number to make it divisible by 9?

5
4
6
3

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The least number to be added to the numbers to make them divisible by 9 is equal to the difference of the least multiple of 9 greater than the sum of the digits and sum of the digits.Sum of digits = 15.Nearest multiple of 9 greater than sum of digits = 18.Hence 3 has to be added.

Number System
The square root of 0.0081 is:

0.009
0.09
0.9
0.91

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

0.09

Number System
A number when multiplied by five times of itself give the value equal to 1445. What is the number ?

17
16
18
15

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17

Number System
If 272/3 × 81-1/2 = 3x, the value of x is

2
3
1
0

ANSWER DOWNLOAD EXAMIANS APP
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