4th Math Riddle 2019

Algebra Level 2

If I am the 50th fastest and slowest runner in my school, how many students are there in my school?


The answer is 99.

Rui Chang Lu by Rui Chang Lu , 15, Oman

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2 solutions

Tom Engelsman
Jan 9, 2019

If your are the 50th fastest AND slowest runner, then 49 students are faster than you + 49 slower than you. Hence there are 49 + 49 + 1 = 99 total students.

3 Helpful 0 Interesting 0 Brilliant 0 Confused
David McWilliams
Jan 9, 2019

I think another acceptable answer is 50. You would be the 50th fastest runner as well as the slowest runner.

0 Helpful 0 Interesting 2 Brilliant 0 Confused

Well not exactly. If there are only 50 children in the school, then I can't be the 50th fastest or slowest runner.

Rui Chang Lu - 2 years, 4 months ago

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