Neither; the sums are equal.
900
An infinite number.
7 and 8 if you multiply them. 48 and 8 if you add them. 64 and 8 if you subtract them. 448 and 8 if you divide them.
31.36$
Well, 1 is equal to 1. 9 is equal to 9. So any number from 0 to 9. I do not think this is what is meant by the question. If you mean any number with more than one digit. There is no such number. Because 11 sums to 2. 19 sums to 10. 21 sums to 3. 29 sums to 11. 111 sums 3. 119 sums to 11. The sums do not grow as fast the increase of digits.
360
Neither; the sums are equal.
900
An infinite number.
half of 56 is equal to 29
7 and 8 if you multiply them. 48 and 8 if you add them. 64 and 8 if you subtract them. 448 and 8 if you divide them.
Yes
56/1
31.36$
56
56