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Number System

Number System
What is the least number, which is perfect square but contains 2700 as its factor?

1800
5400
10800
2700

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

900 * 3 * 3 = 8100

Number System
The difference between 35% of a number and 18% of the same number is 93.5 then what is the 40% of that number ?

245
220
232
225

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Diff = (35 - 18)% of x = 93.517x/100 = 93.5Therefore, x = 550Therefore, 40% of 550 = 220

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

16
8
12
18

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

Number System
Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case.

384
388
386
391

ANSWER DOWNLOAD EXAMIANS APP

Number System
If the numerator of a fraction is increased by 200% and the denominator by 300%, the fraction thus obtained is 1/36. What is the original fractions ?

3/9
5/9
4/9
6/9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the fractions be x/yx + 200% of x/y + 300% of y = 1/3= x + 2x/y + 3y = 1/3= 3x/4y = 1/3Hence x/y = 4/9

Number System
If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number?

3/5
4/5
2/5
1/5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1/4 = 14. 3/5  = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14

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