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Number System

Number System
A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits?

12
60
8
7

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12

Number System
Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number

5
4
7.5
15

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5

Number System
What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ?

77
76
78
75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75

Number System
In how many different ways can the letters of the word TEST' be arranged ?

12
10
8
16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12

Number System
35%of ?=242

693
542
487
394

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

693

Number System
Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is

8.484
8.684
8.784
8.584

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

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