I think the answers in the test suite may be incorrect. Regardless, please make the test suite more robust.
I think the answers in your test suite are incorrect. If "peak value of a sine wave" (X) and "peak value of a square wave" (Y) are understood to be defined consistently, then (given equal RMS voltage) Y should be found as "X divided by sqrt(2)", not as "X multiplied by sqrt(2)".
Bottles of beer
Back to basics 19 - character types
2倍してみよう - ここからスタート！
Determine the length of a string of characters
factorial of a number x
Average of square wave
Concatenate matrix into 4 quadrants for given number of iteration
Create incrementing array
Calculate distance travelled when given radius and rotations
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