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
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)

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)

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