Tagged with 115

#math trivia #115 solution

Burt Kaliski Jr. (@modulomathy) 4/24/12 6:54 PM #math trivia for #April24: #115 is 5*23; digit-sum of each prime factor is the same. What other day-numbers this year does this happen? The other possibilities are, by digit-sum, — 2: 4, 22, 202 — 3: 9 — 4: 169 — 5: 25, 115, 205 — 6: none … Continue reading