What is the greatest common factor of 48 and 60?

What is the greatest common factor of 16 and 40?

What is the greatest common factor of 45 and 75?

What is the greatest common factor of 30 and 42?

What is the greatest common factor of 56 and 84?

What is the greatest common factor of 64 and 80?

What is the greatest common factor of 21 and 49?

What is the greatest common factor of 72 and 96?

What is the greatest common factor of 15 and 28?

What is the greatest common factor of 54 and 90?

What is the greatest common factor of 33 and 88?

What is the greatest common factor of 40 and 100?

What is the greatest common factor of 27 and 81?

What is the greatest common factor of 63 and 81?

What is the greatest common factor of 50 and 75?

What is the least common multiple of 8 and 12?

What is the least common multiple of 6 and 9?

What is the least common multiple of 4 and 10?

What is the least common multiple of 5 and 12?

What is the least common multiple of 9 and 12?

What is the least common multiple of 3 and 7?

What is the least common multiple of 10 and 12?

What is the least common multiple of 7 and 8?

What is the least common multiple of 2 and 11?

What is the least common multiple of 8 and 10?

What is the least common multiple of 3 and 5?

A teacher has 42 pencils and 56 erasers. She makes identical kits using every item. What is the greatest number of kits she can make?

A band has 36 trumpet players and 48 drummers. Each row holds one instrument and all rows are equal. What is the greatest number of players per row?

Mia has 32 red beads and 80 blue beads. She makes identical bracelets using every bead. What is the greatest number of bracelets she can make?

Two ribbons are 84 cm and 90 cm long. Both are cut into equal pieces with none left over. What is the greatest possible length of one piece?

One lighthouse flashes every 6 seconds and another flashes every 10 seconds. They flash together now. In how many seconds will they next flash together?

A ferris wheel loads riders every 4 minutes and a train leaves every 9 minutes. Both start at noon. After how many minutes do they next happen together?

Hot dogs come in packs of 8 and buns in packs of 5. What is the smallest number of hot dogs Leo can buy so every one gets a bun?

Ava visits the library every 3 days and Ben visits every 4 days. They are both there today. In how many days will they both be there again?

A chess club meets every 7 days and a choir meets every 12 days. Both met today. In how many days will they meet on the same day again?

The greatest common factor of 20 and 30 is 10.

The greatest common factor of 7 and 11 is 1.

The greatest common factor of two numbers is never greater than the smaller number.

The least common multiple of two numbers is always equal to the product of the two numbers.

The least common multiple of two numbers is always smaller than both numbers.