1. Of the three numbers whose average is 60, the first is one

fourth of the sum of the others.

The first number is :

(1) 30 (2) 36

(3) 42 (4) 45

(SSC CGL Prelim Exam. 04.07.1999

(Second Sitting)

2. Of the three numbers, second is

twice the first and also thrice the

third. If the average of the three

numbers is 44, the largest number is :

(1) 24 (2) 72

(3) 36 (4) 108

(SSC CGL Prelim Exam. 24.02.2002

(IInd Sitting) & (SSC CGL Prelim Exam.

27.07.2008 (IInd Sitting)

3. The average of first three numbers is thrice the fourth number.

If the average of all the four numbers is 5, then find the fourth

number.

(1) 4.5 (2) 5

(3) 2 (4) 4

(SSC CGL Prelim Exam. 24.02.2002

(Middle Zone) and SSC CGL Prelim

Exam. 13.11.2005 (Ist Sitting)

4. Of the three numbers, first is

twice the second and second is

twice the third. The average of

three numbers is 21. The smallest of the three numbers is

(1) 9 (2) 6

(3) 12 (4) 18

(SSC CPO S.I. Exam. 12.01.2003)

5. Of the three numbers, the first

is 3 times the second and the

third is 5 times the first. If the

average of the three numbers is

57, the difference between the

largest and the smallest

number is

(1) 9 (2) 18

(3) 126 (4) 135

(SSC CPO S.I. Exam. 12.01.2003)

6. Of the three numbers, the first

is twice the second and the second is 3 times the third. If their

average is 100, the largest of the

three numbers is :

(1) 120 (2) 150

(3) 180 (4) 300

(SSC CGL Prelim Exam. 08.02.2004

(First Sitting

7. Of the three numbers, the first

is twice the second and the second is thrice the third. If the average of the three numbers is 10,

the largest number is :

(1) 12 (2) 15

(3) 18 (4) 30

(SSC CPO S.I. Exam. 12.01.2003)

8. The average of first three numbers is double of the fourth

number. If the average of all

the four numbers is 12, find

the 4th number.

(1) 16 (2)

48

7

(3) 20 (4)

18

7

(SSC Graduate Level Tier-II

Exam. 29.09.2013

9. The average of three numbers is

77. The first number is twice

the second and the second number is twice the third. The first

number is :

(1) 33 (2) 66

(3) 77 (4) 132

(SSC CGL Prelim Exam. 13.11.2005

(First Sitting)

10. Out of three numbers, the first

is twice the second and is half of

the third. If the average of the

three numbers is 56, then difference of first and third number is

(1) 12 (2) 20

(3) 24 (4) 48

(SSC CGL Prelim Exam. 13.11.2005

(Second Sitting)

11. The average of three numbers is

28, the first number is half of the

second, the third number is twice

the second, then the third number is

(1) 48 (2) 36

(3) 24 (4) 18

(SSC Section Officer (Commercial Audit)

Exam. 26.11.2006 (Second

Sitting)

12. The average of three numbers is

40. The first number is twice the

second and the second one is

thrice the third number. The difference between the largest and

the smallest numbers is

(1) 30 (2) 36

(3) 46 (4) 60

(SSC CHSL DEO & LDC

Exam. 04.12.2011 (IInd Sitting

(North Zone)

13. Among three numbers, the first

is twice the second and thrice the

third. If the average of the three

numbers is 49.5, then the difference between the first and the

third number is

(1) 54 (2) 28

(3) 39.5 (4) 41.5

(SSC CGL Tier-1 Exam 26.06.2011

(First Sitting)

14. Out of 4 numbers, whose average is 60, the first one is onefourth of the sum of the last

three. The first number is

(1) 15 (2) 45

(3) 48 (4) 60

(SSC CGL Tier-1 Exam 26.06.2011

(Second Sitting)

15. Of the three numbers, the first

number is twice of the second

and the second is thrice of the

third number. If the average of

these 3 numbers is 20, then the

sum of the largest and smallest

numbers is

(1) 24 (2) 42

(3) 54 (4) 60

(SSC CPO (SI, ASI & Intelligence Officer)

Exam 28.08.2011 (Paper-I)

ANSWER

1. (2) 2. (2) 3. (3) 4. (1)

5. (3) 6. (3) 7. (3) 8. (2)

9. (4) 10. (4) 11. (1) 12. (4)

13. (1) 14. (3) 15. (2)