Which number is less than 100 and is a square number and a cube number?

Well, isn't that just a happy little question! The number you're looking for is 64. It's less than 100, and it's both a square number (8 x 8) and a cube number (4 x 4 x 4). Just like painting a beautiful landscape, sometimes all it takes is a little patience and a gentle touch to find the answer you're looking for.