Write a function to determine if a number is divisible by 15. If a number is divisible by 3 and divisible by 5, then it is divisible by 15.
Previous problem: divisible by 14. Next problem divisible by 16.
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Shortest solution (so far) that keeps to the spirit of the challenge. Code is also easy to read.
Another short solution that keeps to the spirit of the challenge.
Select every other element of a vector
Remove the vowels
Project Euler: Problem 6, Natural numbers, squares and sums.
Replace multiples of 5 with NaN
Divisible by 14
Lights Out 27 - 3x3x3, <4 moves
Divisible by n, prime divisors from 20 to 200
Lights Out 14 - 5x5, four stages, x moves
Lights Out 34 - m x n x o, q stages, with wrapping, x moves
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