3%
How about here? What is the LEAST number of blocks you need to add together in order to reach the number 10? Type the total number of blocks needed below.
How about here? What is the LEAST number of blocks you need to add together in order to reach the number 10? Type the total number of blocks needed below.

Interesting fact

Thanks to exponential growth, a sheet of paper folded in half 103 times would be as thick as the entire observable universe!

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