Question

What is the least number that should be subtracted from 0.000326 to have a perfect square is 

(a) 0.000004 

(b) 0.000002 

(c) 0.04 

(d) 0.02

Answer 1

(b) 0.000002

0.000326 = \(\frac{326}{10^6}\)

\(\therefore\) Least number to be subtracted = \(\frac{2}{10^6}\) = 0.000002