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Three piece of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length.

Question 1:

Three piece of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length.
What is the greatest possible length of each plank?

A. 7 m

Feedback The maximum possible length = (HCF of 42, 49, 63) = 7

B. 14 m

C. 42 m

D. 60 m

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