20 6 8 10 July 8, 2019 16 32 64 128 6 8 10 12 and 20 are prime numbers Lcm of 6 8 10 20 Gcf of 6 8 10 20 Mcm de 6 8 10 20 梯形abcd中// 6 20 8 10求梯形abcd面積為多少平方單位
