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Finding the LCM

A toy store i...

Question

A toy store is giving away free teddy bears as a gift to every 100th customer and board games to every 190th customer.
Which customer holds a chance to get both the gifts?

A

210

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B

1,900

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C

2,000

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D

530

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Solution

The correct option is B 1,900
Using the ladder method, the LCM of 100, 190:

LCM (100, 190) = 2 × 2 × 5 × 5 × 17 = 1900

Thus, the 1,900th customer would get both the gifts.

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