Tagged with 93

#math trivia #93 solution

Burt Kaliski Jr. (@modulomathy) 4/2/12 9:45 AM #math trivia for #April2: #93 can be checked for divisibility by 3 by adding the digits and checking the sum. Why does this test work? The classic test for divisibility by 3 is to add the digits of a number and test if the sum is divisible for … Continue reading