Number System

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71 What is the value of: (12 + 22 + 32+......... + 102) ?

A
385
B
380
C
390
D
375

72 In an examination, Suraj scored 52% marks but failed by 23 marks. In the same examination, Sanjay scored 64% marks and get 34 marks more than the passing marks. What is the score of Sekh in the same examination, who has scored 84% marks?

A
396
B
399
C
398
D
392

73 Find the number, If 60% of 3 / 5 of a number is 36:

A
106
B
100
C
108
D
102

74 What is the dividend where divisor is 13, quotient is 30 and remainder is 12:

A
402
B
543
C
436
D
455

75 Find the unit digit in the product of (268×539×826×102):

A
5
B
3
C
4
D
2

76 Find the last two-digit's of 15x37x63x51x97x17

A
35
B
45
C
55
D
85

77 When student mistook the divisor by 12 instead of 21 and obtained 35 as quotient, find the correct quotient ?

A
26
B
24
C
26
D
20

78 What is sum of all even natural numbers between 1 and 31 is:

A
160
B
520
C
240
D
420

79 When dividing a certain number by 357, the remainder is 39. On dividing the same number by 17, Find the mainder:

A
5
B
3
C
7
D
6

80 What will be the remainder when 41000 is divisible by 7?

A
1
B
2
C
4
D
None of these