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Number System

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

81
91
71
61

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
How many figures are required for numbering the pages of a book containing 1000 pages?

6489
3892
2893
2883

ANSWER DOWNLOAD EXAMIANS APP

Number System
Find the smallest number which should be multiplied with 520 to make it a perfect square.

55
120
30
None of these

ANSWER DOWNLOAD EXAMIANS APP

Number System
Two-third of a positive number and 25/216 of its reciprocal are equal. The number is:

12/5
144/25
25/144
5/12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x. Then,2/3 x = 25/216 * 1/xx2 = 25/216 * 3/2 = 25/144 x = 5/12

Number System
3√103820 x 3√274620 = ?

3065
3055
3045
3035

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3√103820 = 47 and 3√274620 = 65 ∴ ? = 47 x 65 = 3055

Number System
If the difference between a number and its three-fourth is 18, find the number.

68
57
61
72

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.According to the question,x - 3x/4 = 18= x/4 = 18= x = 4 x 18 = 72

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