It’s time, once again, to think outside the box! So far, over 400 expii users have given solve a try with Set One. Now, you can have twice the mathematical fun– solve SET TWO has just been launched!

Set Two features an easy warm-up problem, four problems of increasing difficulty, and a final bonus question. This time, the problems feature exercises in various concepts, from longitude and latitude, to finding permutations, and more!

If you’ve yet to venture into the brain-tickling fun of solve, or even if you’ve tried Set One, these problems will inspire your creative thinking. While you’re bored over winter break, give these a try. Get started here.

As with the first set, Set Two was curated by CMU math professor, International Math Olympiad coach, and expii founder Po-Shen Loh.

Visit the solve page on expii.com to try both problem sets! You can also sign up to be notified when Set *Three* is released in January.

Practice, solve, and share your explanations and solutions with us!

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