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srinadh

· started a discussion

· 1 Months ago

wrong ans (Question: 124730.0 )

ans is 20 because 12 +1 =13 ; 13+8=21 ; 21+27=48 ; 48+64=112 ; 112+125=237 cubes are added(1,2,3,4,5).So 20 the right ans for the given question

Question:
Direction : Find the wrong term in the given number series.


12, 13, 21, 47, 112, 237

Options:
A) 13
B) 237
C) 20
D) 47
E) None of these
Solution:
12 + 13 = 13

13 + 23 = 21

21 + 33 = 48

48 + 43 = 112

112 + 53 = 237

Knowledge Expert

· commented

· 1 Months ago

52 is the correct answer...

The pattern is +0, +3, +8, +15 ... i.e. + (1^2 - 1), + (2^2 - 1), + (3^2 - 1), + (4^2 - 1) ........

So, missing term = 28 + (5^2 - 1) = 28 + 24 = 52.
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