All number are not a perfect square except option (d), which is a perfect square of 143 = 196.
Except option (c) all are mammal whereas scarab is an insect.
Except option (c) rest all are perfect squares.
President is the only person, who does not represent any house or parliament.
Only in option (c) the last numbers (i.e., both end numbers are not same).
8(3 + 5) -------- 15(3 x 5)
25 = (5)2 ----------- 36 = (6)2
49 = (7)2 ------------ 64 = (8)2
81 = (9)2 ----------- 100 = (10)2
The given series is in pattern + 4, + 8, + 12, + 16, ...............
So, the missing term = 41 + 20 = 61
The given series is the pattern x1, x2, x3, x4, .............
so, the missing term = 24 x 5 = 120
the given series is in the pattern x 2 + 1, x 2 + 2, x 2 + 3,............
So, the missing term = 59 x 2 +4 = 122
The given series is in the pattern (22 - 1), (42 - 1),............ (82 - 1), (102 - 1), (122 - 1). So, the missing term is (62 - 1) = 35
The given series is in pattern ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2. So the missing term is 960 ÷ 5 = 192
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