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Directions:

In each of these questions, four terms are given. While three of them are identical in some way, one is different from the rest. Select the odd one as your answer.


5 : 21 : : 7 : ?
Options:
A .  43
B .  30
C .  49
D .  25
Answer: Option A
Answer: (a)We have 5 × (5 –1) + 1 = 21 Similarly, 7 × (7 – 1) + 1 = 43
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