Answer :

7 rows of 10 chairs 
10 rows of 7 chairs 
14 rows of 5 chairs 
5 rows of 14 chairs
AL2006
-- 2 rows of 35 chairs
-- 5 rows of 14 chairs
-- 7 rows of 10 chairs
-- 10 rows of 7 chairs
-- 14 rows of 5 chairs

Other Questions