self Maths Puzzle

Maximum power of 2 is 4 in c. and either a or b will take 3 and other will take 0, 1, 2, 3?

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self Other Question

Find the number of combinations of (a, b, c) if LCM (a, b) = 1000, LCM (b, c) = 2000, LCM (c, a) = 2000 If 12 carpenters working 6 hours a day can make 460 chairs in 24 days, how many chairs will 18 carpenters make in 36 days, each working 8 hours a day?