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49.

Find the wrong number in this series.
2, 3, 10, 40, 172, 885, 5346
(a)40
(b)172
(c)885
(d)5346
Answer is: A(2 x 1) + 1 = 3
(3 x 2) + 4 = 10
(10 x 3) + 9 = 39
So, 40 is wrong.

50.

Find the wrong number.
16, 4, 2, 1.5, 1.75, 1.875
(a)2
(b)1.5
(c)1.75
(d)1.875
Answer is: C16 x 0.25 = 4
4 x 0.50 = 2
2 x 0.75 = 1.5
1.5 x 1 = 1.5
So, 1.75 is wrong

51.

Find the missing number.
abb_baa_a_bab_aba
(a)aabb
(b)abab
(c)abba
(d)baab
Answer is: Ctwo series are increasing abba and baab

52.

Find the missing number.
bca_b_aabc_a_caa
(a)cbaa
(b)bcaa
(c)aabc
(d)acba
Answer is: Bbcaa, is repeating

53.

Find the missing number. _stt_tt_tts_
(a)ttss
(b)tsts
(c)tsst
(d)stst
Answer is: Ctst, is repeating

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