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easiest way to find the LCM is to find the prime factors of each of the numbers and multiply what they don't have. So 6=2X3 and 8 = 2x2x2. So you need to multiply 2 to 6 and 3 to 8 to get their LCM 24.
Since its 5 Diamonds:6 Rubies, you have to multiply both by 4
and multiply 3 to 8 Rubies: 3 Emeralds.
Add them all together, you'll get 53
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