Question

The sum of all three digit numbers, formed using non zero digits, with all the digits perfect square of a natural number, is

• A. $13986$
• B. $12986$
• C. $13986$
• D. $13968$

Answer 1

The correct option is A $13986$

Number of ways in which 3 digit numbers will be formed by $1,4,9=3^3=27$ ways.

Sum of all these possibilities $=(1+4+9)\cdot 3^2\cdot 111=13986$