The sum of four natural numbers a1, a2, a3 and a4 is 210.
What is the minimum possible LCM of these 4 mentioned
natural numbers?
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The price of Machine D equals the sum of the prices of machine A, B and C whose price are in the ratio 2:3:4 respectively. If weights of A, B, C and D varies as square of its individual price and difference of weight of D and A, B and C together is 9880 kg. Then what is the weight of D?