Kimberly, Risa and Sarah were each given a piece of thread of equal length. Kimberly cut hers into equal lengths of 3 cm, Risa cut hers into equal lengths of 6 cm, and Sarah cut hers into equal lengths of 7 cm. If there were no remainder in each case, find the shortest length of thread given to each of them.
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42
Multiples of 6: 6, 12, 18, 24, 30, 36, 42
Multiples of 7: 7, 14, 21, 28, 35, 42
Shortest length of thread given to each of thecm
= Lowest common multiple of 3 cm, 6 cm and 7 cm
= 42 cm
Answer(s): 42 cm