Question
7 13 31 97 391 1967 13 A) B) C) D) E) What will come in place of (D)?
Answer: Option B
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As 7 13 31 97 391 1957
Here 7x1+6 = 13
13x2+5 = 31
31x3+4 = 97
97x4+3= 391
391x5+2 = 1957
(A) (B) (C) (D) (E) 13 19 43 133 535 2677
Same as 13x1+6 =19
19x2+5 = 43
43x3+4= 133
133x4+3 = 535
535x5+2 = 2677
Hence in place of (D) number 535 will be come.
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