mcq on number series for sbi po
Solve the number series questions given below:
2 26 286 ? 1801890090 270270
(a) 3088
(b) 2667
(c) 3862
(d) 2574
(e) None of these
Solution: (d)
The pattern of the number series is as given below:
\(\displaystyle 2\times 13=26\)
\(\displaystyle 25\times 11=286\)
\(\displaystyle 286\times 9=2574\)
\(\displaystyle 2574\times 7=18018\)
\(\displaystyle 18018\times 5=90090\)
8 ? 30 105472.5 2598.75 16891.875
(a) 24
(b) 10
(c) 12
(d) 16
(e) None of these
Solution: (a)
The pattern of the number series is as given below:
\(\displaystyle 8\times 1.5=12\)
\(\displaystyle 12\times 2.5=30\)
\(\displaystyle 30\times 3.5=105\)
\(\displaystyle 105\times 4.5=472.5\)
3 4 ? 21 85 110 326
(a) 7
(b) 10
(c) 12
(d) 14
(e) None of these
Solution: (c)
The pattern of the number series is as given below:
\(\displaystyle 3+{{1}^{2}}=4\)
\(\displaystyle 4+{{2}^{3}}=12\)
\(\displaystyle 12+{{3}^{2}}=21\)
\(\displaystyle 21+{{4}^{3}}=85\)
\(\displaystyle 85+{{5}^{2}}=110\)
\(\displaystyle 110+{{6}^{3}}=326\)
10000 2000 400 80 16 3.2 ?
(a) 0.38
(b) 0.45
(c) 0.64
(d) 0.54
(e) None of these
Solution: (c)
The pattern of the series is as follows:
\(\displaystyle 10000\div 5=2000\)
\(\displaystyle 2000\div 5=400\)
\(\displaystyle 400\div 5=80\)
\(\displaystyle 80\div 5=16\)
\(\displaystyle 16\div 5=3.2\) $latex \displaystyle 3.2\div 5=0.64
5 ? 15 75 525 4725 51975
(a) 6
(b) 10
(c) 8
(d) 5
(e) None of these
Solution: (e)
The pattern of the series is as follows :
\(\displaystyle 5\times 1=5\)
\(\displaystyle 5\times 3=15\)
\(\displaystyle 15\times 5=75\)
\(\displaystyle 75\times 7=525\)
\(\displaystyle 525\times 9=4725\)
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