SOLUTION: 1. The LCM of two whole numbers is 20. find their 8th common multiple. 2. the 5th common multiple of two whole number is 1050. find the LCM.

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: 1. The LCM of two whole numbers is 20. find their 8th common multiple. 2. the 5th common multiple of two whole number is 1050. find the LCM.      Log On


   

Question 1062526: 1. The LCM of two whole numbers is 20. find their 8th common multiple.
2. the 5th common multiple of two whole number is 1050. find the LCM.
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
Does somebody know what is "8th common multiple" ?

"5-th common multiple" ?

Never saw this in math texts.



Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Doing only #1.

4 and 5 have product of 20.
4%2A5=20, their Lowest and "first" multiple is 20.

1%2A20=20
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2%2A20=40
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3%2A20=60
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4%2A20=80
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5%2A20=100
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8%2A20=160---------their eighth common multiple