Practice Questions on Number System
Aptitude Questions and Answers

Moderate Number System Question - 6

Q6.

What is the remainder when $3^7$ is divided by $8$?

A.

1

B.

2

C.

3

D.

5

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Moderate Number System Question - 7

Q7.

A boy writes all the numbers from 100 to 999. The number of zeroes that he uses is '$a$', the number of 5's that he uses is '$b$' and the number of 8's he uses is '$c$'.

What is the value of $b+c-a$?

A.

280

B.

380

C.

180

D.

80

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Moderate Number System Question - 8

Q8.

Find the unit's digit in $264^{102} + 264^{103}$

A.

0

B.

2

C.

4

D.

6

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Moderate Number System Question - 9

Q9.

In a meet, persons from five different places have assembled in Bangalore High School. From the five places the persons come to represent are $42,60,210,90$ and $84$.

What is the minimum number of rooms that would be required to accommodate so that each room has the same number of occupants and occupants are all from the same places?

A.

44

B.

62

C.

81

D.

96

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Moderate Number System Question - 10

Q10.

A set has exactly five consecutive positive integers starting with 1.

What is the percentage decrease in the average of the numbers when the greatest one of the numbers is removed from the set?

A.

8.54

B.

12.56

C.

15.25

D.

16.66

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