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Number System

Number System
A number exceeds by 25 from its 3/8 part. Then the number is?

35
39
32
40

ANSWER DOWNLOAD EXAMIANS APP

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
15
7.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

Number System
The difference between 71% of a number and 46% and of the same number is 212. What is 75% of that number

724
845
673
636

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ 71% of x - 46% of x = 212∴ (71 - 46)% of x = 212∴ 25/100 x x = 212∴ x = 212 x 4 = 848∴ 75% of 848 = 848 x 75/100  = 636

Number System
Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999

490
495
485
480

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Required average score                    = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8                   = 3880 / 8                   = 485

Number System
The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ?

27.84
24.84
25.84
21.84

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84

Number System
3251 + 587 + 369 - ? = 3007

1200
1250
1300
1375

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200

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