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No it's 51
Naw, 5 + 1 = 6, 6 is divisible by 3, so 51 is divisible by 3.
I shared this at work recently and nobody cared. 3 6 and 9 are all kinda special.
17
Sure, and 91 is divisible by 7 if you know your 7 times tables.
Only if you weren't taught (or were, but too long ago lol) the divisible by 3 rule - if the sum of the digits is divisible by 3, so is the whole number. 5+1=6 therefore 51 is divisible by 3! Bonus division rule - if it was also an even number and therefore divisible by 2, you could deduce that the whole number was divisible by 6.
Actually 51/3! Is 8.5
You bastard
Actually, 51 is not divisible by 3!
It is divisible by 3
Hilarious.
Surely it's 1? Looks prime, and some people will even argue that it is!
Its only factors are 1 and itself after all
Agreed. 51 looks prime AF.