You're *very* close with this one. Remember that r is input as a double, not a string.
Sum all integers from 1 to 2^n
Is the Point in a Triangle?
Height of a right-angled triangle
The number of trailing zero digit of a factorial
Expand 10^n to Powers of 4
Accessing values in a cell
Return elements unique to either input
Pandigital Multiples of 11 (based on Project Euler 491)
Give me Hamming on five, hold the mayo
Breaking Out of the Matrix
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