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18 votes
25 answers
1k views

Repeated Consecutive Digital Product Sum Convergence

29 votes
41 answers
2k views

Adding up the digits and the digits reversed

28 votes
69 answers
4k views

Find the sum of the divisors of N

15 votes
23 answers
2k views

Counting up and down while doubling the increments

18 votes
27 answers
2k views

Smallest Harmonic number greater than N

26 votes
42 answers
3k views

Sum of a range of a sum of a range of a sum of a range of a sum of a range of a sum of

14 votes
25 answers
2k views

Number in Number-squared

25 votes
27 answers
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38 votes
47 answers
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Half, Half Half, and, Half

6 votes
27 answers
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Enterprise Quality Code Prime Sieve

17 votes
17 answers
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Number of coins needed to make change

53 votes
43 answers
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Last odd digit of power of 2

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25 answers
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Golf me the Schlosberg Numbers

32 votes
35 answers
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Smallest number such that concatenation is a square

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