For this case, a number is defined ugly if it has prime factors consisting of only elements of x.
Find the nth ugly number.
so the ans is 15.
Unlike the previous two "ugly()" problems, in this one it appears that the number "1" is not considered ugly.
Return the 3n+1 sequence for n
"Look and say" sequence
Are all the three given point in the same line?
Is it an Armstrong number?
Sum the numbers on the main diagonal
Maya - 01
Sub-sequence - 01
Yoonir - 03
Queen's move - 02
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