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NUMBER SYSTEM

Number System
√343 = ?

20
18
19
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √343 = 18

Number System
If a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ?

60
260
180
120

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120

Number System
If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ?

652
692
689
678

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652

Number System
The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ?

73
75
76
74

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x + x + 1 + x + 2 + x + 3 + x + 4= 190= 5x + 10 = 190= 5x = 190 - 10 = 180= x = 180/5 = 36The largest number = 36 + 4 = 40∴ Required sum = 36 + 40 = 76

Number System
If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ?

3/5
13/25
6/7
12/25

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25

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