Find Odd

(a) ink
(b) pen
(c) pencil
(d) brush
(e) chalk-stick

Answer:(a) 
Ink is a medium while others are instruments.

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24,65,34,66,14,96,100,550

a) 24
b) 65
c) 100
d) 66

Answer: b
Exp: Beacause of Odd one.