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Number System

Number System
7.8 x 4.5 x 4.2/0.14 = ?

1032
1053
1087
1012

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

7.8 x 4.5 x 4.2/0.14 = 1053

Number System
If A + B = 30 and AB = 94, What is the value of A² + B² ?

824
625
920
712

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94                                = 900 - 188 = 712

Number System
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ?

1
2
3
4

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4

Number System
Let R = qs—4. When s=8, R=16. When s=10, R is equal to

22
23
20
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

21

Number System
In each of the following numbers, what should be the missing digit in the indicated place such that the number is a multiple of 11?

5
3
2
8

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Divisibility of 11: If the difference of the sum of the digits at odd places and the sum of the digits at even places of a number is zero or a multiple of 11, then that number is divisible by 11.As per divisibility rule of 11, difference = (x + 21) - 18 = x + 3=> x + 3 = 11 => x = 8

Number System
Find the number which multiplied by 15 is increased by 196.

20
14
26
28

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,15x - x = 196x = 14

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