Riddles, brain puzzles and mathematical problems

[Froge]

I tried to look for the most plausible factors that can multiply up to 1000, eventually narrowing it down to 10^3 and 8 * 125. However you can't string together five 8's to get 125, while it's possible to make a 10 and a 3 using three 8's each.

Next puzzle coming up in a few hours