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Number System

Number System
If a number is subtracted from its square we get 272. Find the number?

24
17
14
22

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x2 – x = 272 => x =17

Number System
If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ?

111
101
121
131

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2                        = 47765 - 33124Therefore x² = 14641,                Therefore x = 121

Number System
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:

30
20
40
None of these

ANSWER DOWNLOAD EXAMIANS APP

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?

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

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

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
75% of 250 - ?% of 380 = 54.5

39
33
31
35

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35

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