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Multiples

Stones with m...

Question

Stones with multiples of 2, 3 and 4 could stay afloat. There were 25 stones. How many stones in total could stay afloat?

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is B 2

Multiples of 2 = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24.

Multiples of 3 = 3, 6, 9, 12, 15, 18, 21, 24.

Multiples of 4 = 4, 8, 12, 16, 20, 24.

The common mulitple of 2, 3, and 4 = 12, 24

$∴$ 2 stones in total could stay afloat.

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