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Number System

Number System
The number of prime factors of (6)10×(7)17×(55)27

61
101
41
91

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

91

Number System
Pick the wrong number from the given number series. 3,4,10,33,135,685,4116

33
135
685
10

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116

Number System
A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15?

13
1
11
9

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

45 + 31 = 76/15 = 1 (Remainder)

Number System
Complete the series : 81, 69, 58, 48, 39 ........

29
30
31
28

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

31

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

15 years
18 years
25 years
21 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the father's age be x and son's age yTherefore, x + y = 60   ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15

Number System
What should come in place of question mark (?)? 8 : 1 1 : : 72:

89
109
99
79

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99

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