Number Theory

Greatest Common Divisor / Lowest Common Multiple

Lowest Common Multiple

         

What is the least common multiple of 22 and 33?

What is the lowest common multiple of 39 and 65?

A bus stop has two bus lines: the red line and the blue line. The red line stops every 1818 minutes, and the blue line stops every 2727 minutes. If the buses of both lines have just simultaneously stopped at the bus stop, how many minutes later will the buses of the two lines meet at this bus stop again?

If the lowest common multiple of 3a5b3^a 5^b and 343^4 is 353^5, what is 3a5b?3^a 5^b ?

What is the least common multiple of 12 and 21?

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