Find the odd man out:4, 9, 256, 529, 5735739529256

The given numbers are 4, 9, 256, 529, 5735739529256.

Let's check if these numbers are perfect squares:

• The square root of 4 is 2, which is a whole number.
• The square root of 9 is 3, which is a whole number.
• The square root of 256 is 16, which is a whole number.
• The square root of 529 is 23, which is a whole number.
• The square root of 5735739529256 is approximately 2390784.6, which is not a whole number.

So, the number 5735739529256 is the odd one out because it is not a perfect square.