#math trivia for #August30: #242 has the form abc, a+c=b. Are all such three-digit numbers also divisible by 11? Vice versa? — Burt Kaliski Jr. (@modulomathy) August 31, 2013 Question 1:  Are all three-digit numbers having the form abc where a+c=b divisible by 11? Answer:  Yes. Proof:  Let x be a number of the specified … Continue reading →