[kinsman redeemer]

Why the challenge?

First, it is an easy problem with an easy solution (117-miles).

Second, you say that this is a standard high school math question. I am certain that either of my children could answer this question by the 6th or 7th grade. The complexity of the question is low, requiring only a fundamental understanding of the Pythagorean Theorem.

[meandog]

First, it is an easy problem with an easy solution (117-miles). Second, you say that this is a standard high school math question. I am certain that either of my children could answer this question by the 6th or 7th grade. The complexity of the question is low, requiring only a fundamental understanding of the Pythagorean Theorem.

In my high school, our teachers asked the question in binary enumeration too...:

Two electrons go out in opposite directions, each going 11. They both meet another electron and are repelled in opposite 90-degree angles, each traveling 100. How far apart are they: