Exam Maths Puzzle Numerical Ability Age Problem

12=6
6=3
8=?
the answer is 5 as
6*2=12
3*2=6
and
6+2=8
so
3+2=5

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Exam Other Question

Sinha, Kripa and Shwetha are three anchors for three different Television shows. A survey shows that 30%,20% and 85% of the people watch Sinha, Kripa and Shwetha shows respectively.20% people watch exactly 2 of the 3 channels and 5% watch none. 1,1,2,3,6,7,10,11,?
the answer is 14
by leaving 2 numbers starting from 3