There are three pieces of timber of lengths 42 m, 49 m and 63 m. These have to be divided into planks of the same length. The least possible number of planks is
Reveal answer
Fill a bubble to check yourself
There are three pieces of timber of lengths 42 m, 49 m and 63 m. These have to be divided into planks of the same length. The least possible number of planks is