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Number System

Number System
If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers.

50
30
125
25

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.

Number System
When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ?

65
55
45
35

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45

Number System
The sum of two numbers is 22. Five times one number is equal to 6 times the other. The bigger of the two numbers is:

10
12
16
15

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be x and (22 - x). Then,5x = 6(22 - x) 11x = 132 => x = 12So, the numbers are 12 and 10.

Number System
432+2170+35=?

523
494
678
729

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

494

Number System
What should come in place of the question mark (?) in the following number series ? 888 888 444 148 ? 7.4

29
35
37
33

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

888 ÷ 1 = 888888 ÷ 2 = 444444 ÷ 3 = 148148 ÷ 4 = 3737 ÷ 5 = 7.4

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

12
18
8
16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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