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Number System

Number System
If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ?

50
47
48
49

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48

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

396
382
378
343

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

Number System
In a fraction, twice the numerator is two more than the denominator. If 3 is added to the numerator and the denominator each, then the resultant fraction will be 2/3 .What was the original fraction

19/12
11/12
7/12
17/12

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

7/12

Number System
A shopkeeper purchased 200 bulbs for Rs. 10 each. However, 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs. 12 each. What will be percentage profit?

33
17
21
14

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

12

Number System
(95.6x 910.3) ÷ 92.56256 = 9?

12.24
13.34
14.44
15.54

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

13.34

Number System
(1024—263—233)÷(986—764— 156) =?

8
None of these
6
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8

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