Number System

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81 The denominator of a fraction is 3 more than it's numerator. If the numerator is increased by 7 and denominator is decreased by 2, we will obtain 2. What is sum of numerator and denominator of the fraction ?

A
5
B
13
C
17
D
19

82 If x and y are positive integers such a way that (3x + 7y) is a multiple of 11, then which of the following will be divisible by 11 ?

A
3x - 8y
B
2x - 7y
C
4x - 9y
D
9x - 11y

83 When 1/7 of a number is subtracted from the number it'self, it gives the same value as the sum of all the angles of anytriangle. Find out the number?

A
224
B
210
C
140
D
350

84 What least number must be added to 1057 to get a number exactly divisible by 23?

A
1
B
3
C
2
D
4

85 Find out the unit digit in(365 × 659 × 771):

A
6
B
4
C
2
D
1

86 When a number divided by 5, leaves 3 as remainder. What will be the remainder when the square of this number is divided by 5 ?

A
3
B
4
C
5
D
0

87 A candidate took 12 as divisor instead of 21. The quotient obtained by him was 35. Find the correct quotient:

A
10
B
12
C
20
D
15

88 When 17200 is divided by 18, find out the remainder:

A
1
B
4
C
5
D
3

89 What will be the remainder when 19100 is divided by 20 ?

A
19
B
20
C
3
D
1

90 The number (6x2 + 6x) for natural number x is always divisible by:

A
6 and 12
B
12 only
C
6 only
D
3