What is the square of 7?

The square of a number is calculated by multiplying the number by itself. In this case, to find the square of 7, you perform the calculation:

7 × 7 = 49.

This demonstrates that 49 is indeed the correct value, as it directly results from the multiplication of 7 by itself. The other options—42, 56, and 64—do not represent the product of 7 multiplied by itself, therefore they cannot be considered the square of 7.