MathCastle
Number TheoryEasyThe Chinese Remainder Theorem

The Chinese Remainder Theorem · Easy problem

Light A flashes at seconds 1,5,9,13,…1, 5, 9, 13, \ldots (every 44 seconds) and light B flashes at seconds 3,10,17,24,…3, 10, 17, 24, \ldots (every 77 seconds). At what second do they first flash together?