Risa, Sarah and Barbara were each given a piece of string of equal length. Risa cut hers into equal lengths of 3 cm, Sarah cut hers into equal lengths of 6 cm, and Barbara cut hers into equal lengths of 10 cm. If there were no remainder in each case, find the shortest length of string given to each of them.
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Multiples of 6: 6, 12, 18, 24, 30
Multiples of 10: 10, 20, 30
Shortest length of string given to each of thecm
= Lowest common multiple of 3 cm, 6 cm and 10 cm
= 30 cm
Answer(s): 30 cm