number series questions for ibps clerk
Solve the number series questions given below:
Find the Wrong number in the number series MCQ
157.5 45 15 6 3 2 1
(a) 1
b) 2
(c) 6
(d) 157.5
(e) 45
Solution: (a)
The given number series is based on the following pattern :
\(\displaystyle 157.5\div 3.5=45\)
\(\displaystyle 45\div 3=15\)
\(\displaystyle 15\div 2.5=6\)
\(\displaystyle 6\div 2=3\)
\(\displaystyle 3\div 1.5=2\)
\(\displaystyle 2\div 1=2\)
Hence, the number 1 is wrong and it should replaced by 2.
4, 6, 34, ?, 504, 1234
(a) 194
(b) 160
(c) 186
(d) 156
(e) 172
Solution: (b)
The given number series MCQ is based on the following pattern :
\(\displaystyle 4+{{1}^{3}}+1=6\)
\(\displaystyle 6+{{3}^{3}}+1=34\)
\(\displaystyle 34+{{5}^{3}}+1=160\)
\(\displaystyle 160+{{7}^{3}}+1=504\)
\(\displaystyle 504+{{9}^{3}}+1=1234\)
960, 839, 758, 709, ?, 675
(a) 696
(b) 700
(c) 688
(d) 678
(e) 684
Solution: (e)
The given number series MCQ is based on the following pattern :
\(\displaystyle 960-839=121={{11}^{2}}\)
\(\displaystyle 839-758=81={{9}^{2}}\)
\(\displaystyle 758-709=49={{7}^{2}}\)
\(\displaystyle 709-684=25={{5}^{2}}\)
\(\displaystyle 684-675=9={{3}^{2}}\)
21 10.5 ? 15. 75 31.5 78.75
(a) 10.5
(b) 11.5
(c) 12.5
(d) 10.25
(e) None of these
Solution: (a)
The given number series MCQ is based on the following pattern :
\(\displaystyle 21\times 0.5=10.5\)
\(\displaystyle 10.5\times 1=10.5\)
\(\displaystyle 10.5\times 1.5=15.75\)
\(\displaystyle 15.75\times 2.0=31.50\)
\(\displaystyle 31.50\times 2.5=78.75\)
6 19 58 ? 214 331
(a) 113
(b) 123
(c) 133
(d) 143
(e) None of these
Solution: (b)
The given number series MCQ is based on the following pattern :
\(\displaystyle 6+(1\times 13)=19\)
\(\displaystyle 19+(3\times 13)=58\)
\(\displaystyle 58+(5\times 13)=123\)
\(\displaystyle 123+(7\times 13)=214\)
\(\displaystyle 214+(9\times 13)=331\)
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