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#### Mathematics Solved MCQs Online Quiz Test

Q.1: A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?

- 28 4/7 years
- 31 5/7 years
- 32 1/7 years
- None of these

B

Q.2: The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers?

- 2
- 5
- 8
- Cannot be determined

C

Q.3: The average of non-zero number and its square is 5 times the number. The number is———-?

- 9
- 17
- 29
- 295

A

Q.4: The average of the two-digit numbers, which remain the same when the digits interchange their positions, is———-?

- 33
- 44
- 55
- 66

C

Q.5: The average of first five multiples of 3 is————?

- 3
- 9
- 12
- 15

B

Q.6: Find the average of all the numbers between 6 and 34 which are divisible by 5.

- 18
- 20
- 24
- 30

B

Q.7: The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

- 0
- 1
- 10
- 19

D

Q.8: Sarfaraz obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?

- 65
- 69
- 72
- None of these

D

Q.9: A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3 chocolates. Find the respective number of boys and girls?

- 70, 50
- 60, 60
- 50, 70
- 40, 80

B

Q.10: Rs. 6000 is lent out in two parts. One part is lent at 7% p.a simple interest and the other is lent at 10% p.a simple interest. The total interest at the end of one year was Rs. 450. Find the ratio of the amounts lent at the lower rate and higher rate of interest?

- 5 : 1
- 4 : 1
- 3 : 2
- 2 : 1

A