Carol and Sandra swim at their local 25 m pool. Sandra always swims 4 lengths in the same amount of time as Carol swims 3 lengths. One Monday morning, Carol swims 36 lengths. How far would Sandra swim in the same time?
Select one option, then click Submit.
600m
675m
900m
1200m
1350m
Select an option, then submit.
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Junior Mathematical Challenge (2025)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →Junior Mathematical Challenge (2025)