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Sequence or not ... That's the question.

Level pending

What is the next number in the sequence?

1 , 4 , 9 , 61 , 52 , 63 , 94 , 46 , 18 , 1 , 121 ...

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

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That seems reasonable. Find out if you're right!

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by Jianzhi Wang

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