Prime factor digits
Narcissistic number ?
Find the 9's Complement
Times 3 problem
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Use of regexp
wait for me
Least common multiple of many numbers
Calories in a slice of pizza?
Mr. Pyramidad & Ms. Whissy Bolower
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