there were five peices of cloth o of lenghts 15 m, 21 m, 36 m, 42 m, 48 m - Math - Mensuration

Question

there were five peices of cloth o of lenghts 15 m, 21 m, 36 m,
42 m, 48 m But all of them could be measured in hole units of a
measuring rod What could be the largest lenght of the rod

Varun.Rawat · Accepted Answer

15 = 3 × 521 = 3 × 736 = 3 × 3 × 2 ×
242 = 3 × 2 × 748 = 3 × 2 × 2 × 2
× 2

HCF = 3
Length of the longest rod = 3 m

there were five peices of cloth o of lenghts 15 m, 21 m, 36 m, 42 m, 48 m. But all of them could be measured in hole units of a measuring rod. What could be the largest lenght of the rod.