Data Sufficiency (DS) | Re: If n and y are positive integers and n represents the number of differ

n,y: positive integers
n = f(y)

if y is a perf square, then n=odd
ie. y=25, f(25)=5ˆ2=(2+1)=3
ie. y=16,f(16)=2ˆ4=(4+1)=5

(1) √n is an oddinteger sufic

if √n=odd, (n positive integer), then n=oddˆ2 which is an oddnumber

(2)\( y =\sqrt{5^{2(n-1)}}\) insufic

\( y =\sqrt{5^{2(n-1)}}=5ˆ(n-1)\)

n=1: 5ˆ0=1 perfsquare=yes
n=2: 5ˆ(2-1)=5perfsquare=no


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