If 5 machines take 5 minutes to make 5 bolts,
how long do 100 machines take to make 100 bolts?

Q: If 5 machines take 5 minutes to make 5 bolts, how long do 100 machines take to make 100 bolts?

5 minutes.. Each machine makes one bolt in 5 minutes. Adding more machines adds more bolts — not more time. The puzzle wants you to multiply; the math politely refuses.

Question

Accepted Answer

5 minutes. — Each machine makes one bolt in 5 minutes. Adding more machines adds more bolts — not more time. The puzzle wants you to multiply; the math politely refuses.