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Number System

Number System
The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number?

59
69
39
49

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

39

Number System
Find the greatest number which leaves the same remainder when it divides 25, 57 and 105.

8
18
16
12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.

Number System
What least number shall be added to 4700 to make it a perfect square ?

91
71
61
81

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.

Number System
1260 x 1.45 - 888 x 1.75 = ?

256
367
273
295

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273

Number System
Look at this series: 1000, 200, 40, ... What number should come next?

2
14
8
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

This is a simple division series. Each number is divided by 5. Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...So answer is a = 8.

Number System
7432 ÷ 32 x ? = 2787

41
12
78
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

7432/32 x ? = 2787= ? = 2787 x 32/7432 = 12

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