What's this number ? This number is a square number , a multiple of 3 and one more than a cube number . Thank you !!!!!!!!!!!

1 Answer
May 22, 2018

Well, you can probably brute force this...

Some square numbers are:

x^2 = 1, 4, 9, 16, 25, 36, 49, 64, 81, 100

  • Of these, the only ones that are multiples of 3 are 9, 36, and 81. Their digits add up to a number divisible by 3.
  • 9 is one more than 2^3 = 8, and neither 36 nor 81 fit this condition. 35 is not a perfect cube and neither is 80.

Therefore, x = 9 is your number.