Tuesday, January 17, 2012

Simple maths puzzzle

If The product of two positive numbers is p. If each of the numbers is increased by 2, the new
product is how much greater than twice the sum of the two original numbers?
(A) p-2
(B) p
(C) p+2
(D) p+4
(E) 2p+4




Answer: (before looking solution, try solving it)

Let numbers be x,y. So xy=p
(x+2)(y+2)-2(x+y)=xy+4
So p+4 is answer

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