The expression ‘7 5’ can be interpreted in different ways, but if we are considering it as a mathematical expression, it is a representation of the numbers 7 and 5. In this case, to find a whole number, we can simply look at the whole numbers involved. If you were referring to the sum of these two numbers, you would add them together:
7 + 5 = 12
Therefore, ‘7 5’ as a whole number can be understood as the sum, which is 12. Alternatively, if it was meant to imply a concatenation of the digits, it could signify the whole number 75. However, in most cases, summing the two numbers is the more common approach.