Math CentralQuandaries & Queries


Question from Hanna, a student:

What is my number?
My number is a perfect square.
The only number in its prime factorization is 2.
My number is a factor of 32.
The sum of its digits is odd.


Since the only prime in the prime factorization is 2 your number must be a power of 2. Calculate powers of 21, 22, 23, 24, ... and for each one check to see if it meets the other requirements.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS