UGC NET Paper 1 GA 2007 Dec Solved Paper

Question : 30 of 50

Marks: +1, -0

Choose the number which is different from others in the group:

Solution:

49 ⇒ 4 + 9 = 13 ⇒ 1 + 3 = 4 =

2^2

63 ⇒ 6 + 3 = 9 =

3^2

77 ⇒ 7 + 7 = 14 ⇒ 1 + 4 = 5
81 ⇒ 8 + 1 = 9 =

3^2

So 77 is odd.

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