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Number System

Number System
What is the sum of 1 + 2 + 3+ ... + 27 ?

343
382
396
378

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378

Number System
What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227

204
234
210
222

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Avg  = 173 + 192 + 198 + 204 + 211 + 223 + 227/7        = 1428/7        = 204

Number System
The difference between a number and its three-fifth is 50. What is the number?

100
125
None of these
75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.

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
On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5?

0
4
1
2

ANSWER DOWNLOAD EXAMIANS APP

Number System
If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth?

5/4
11/13
1/3
7/9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

5/4

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