Math & Logic · Ages 12–15
Riddle #154
A jar holds red and blue marbles in a ratio of 3 to 5. There are 24 more blue marbles than red ones. How many marbles are in the jar altogether?
You solved this one before
Answer: 96
Write the counts as 3k and 5k. The difference 2k = 24, so k = 12 — that is 36 red and 60 blue, 96 in all.