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Number System

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:

None of these
40
20
30

ANSWER DOWNLOAD EXAMIANS APP

Number System
Complete the series : 1, 8, 27, 64, 125, 216 .....

343
373
363
353

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

343

Number System
Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is

44
56
72
38

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

72

Number System
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ?

3
1
4
2

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4

Number System
How many numbers up to 200 are divisible by 2 and 3 both?

29
35
27
33

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

200/6 = 33 2/6 => 33 Numbers

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 ?

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

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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