[Problem & Solution]

TIME : DIGITS SUMMARY 15

Find all times whose digits add up to 15. Only hour and minute values ​​will be taken into account. For example; 09:42 -> 9+4+2=15 or 23:55 -> 2+3+5+5=15, etc.


There is an interesting mathematical rule in this serie. I rest it you to find.

I am giving Python code to find all solutions:

h = 0 m = 0 sh = "" sm = "" for i in range(24): sh = str(i) h = 0 for a in range(len(sh)): h += int(sh[a]) for j in range(60): m = 0 sm = str(j) for a in range(len(sm)): m += int(sm[a]) if h + m == 15: print(i,":",j, end=", ")

Info: All codes are written and solutions found by myself in this site.

Ali Eskici
13.10.2024