What is the least common multiple of 8 and 9______ The greatest common factor is______ The least common multiple of 8 and 10 is______ The greatest common factor is______ ．

What is the least common multiple of 8 and 9______ The greatest common factor is______ The least common multiple of 8 and 10 is______ The greatest common factor is______ ．

8 and 9 are coprime, so the least common multiple of 8 and 9 is 72 and the greatest common factor is 1; 10 = 2 × 58 = 2 × 2 × 2, so the least common multiple of 10 and 8 is 2 × 5 × 2 × 2 = 40 and the greatest common factor is 2; so the answer is 72, 1; 40, 2

Two thirds of a is equal to three quarters of B. what is a: B equal to?

9:8

If 1 of a equals 5 of 50 and 3 of B, then a = () and B = () use the formula

a=50÷5=10
b=50×3÷5=30