TCS Company Numerical Ability Number System

If we subtract a number with y,we get 4 increase of number,once it got divided by y itself.find that number?
a)13 b)12 c)14 d)11

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TCS Other Question

How many different integers can be expressed as the sum of three distinct numbers from the set{13,10,23,28,33,36,43,48}?
A circle has 29 points arranged in a clockwise manner numbered from 0 to 28 . A bug moves clockwise around the circle according to the following rule.If it is at a point i on the circle, it moves clockwise in 1 second by (1+r) places , where r is the remainder (possibly 0) when i is divided by 17. Thus it is at position 5 , it moves clockwise in one second by (1+5) places to point 11. similarly ,if moves (1+11) or 12 places to point 11 in one second.

If it starts at point 0,at what point will it be after 2012 seconds?