SSC CHSL MATHS QUIZ

Question 1:

A family consists of grandparents, parents and two grandchildren. The average age of the grandparents is 69 years, that of the parents is 39 years, and that of the grandchildren is 9 years. What is the average age (in years) of the family?

39

37

35

41

Question 2:

The average of eight consecutive odd numbers, taken in descending order, is 82 . What is the average of the first four numbers?

78

86

88

84

Question 3:

The average of eight consecutive even numbers is 65 . If the next four consecutive even numbers are included, then what is the average of all the numbers?

67

70

69

68

Question 4:

The average of five numbers a, b, c, d and e is 150 . If the average of the first three numbers a, b and c is 130 , then the average of the last two numbers d and e is:

120

140

160

180

Question 5:

The average of 15 numbers is 30 , while the average of 13 of these numbers is 32 . If the remaining two numbers are equal, then what is each of the two numbers?

34

31

17

16

Question 6:

What is the average of the prime numbers between 20 and 50 ?

35 . 857

35 . 917

35 . 234

35 . 123

Question 7:

Find the average of p and q , if the average of 22, 15, 28, p and q is 16.

15

7.5

6

12

Question 8:

The average of the three-digit numbers that have all three digits the same is:

666

444

555

525

Question 9:

The average of six positive numbers is $12.5$. If the first number is two-third of the sum of the last five numbers, then find the average of the last five numbers.

$15$

$12$

$9$

$8$

Question 10:

The average age of 15 students of a class is 14 years. Out of these, the average age of 6 students is 15 years and that of other 8 students is 13 years. Find the age of the 15th student.

16 years

15 years

18 years

14 years