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22-05-2020
Mathematics

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A mystery number is a factor of 100 and a common multiple
of 2 and 5. The sum of its digits is 5. What is the number?

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MathPhys MathPhys

22-05-2020

Answer:

50

Step-by-step explanation:

The number is a common multiple of 2 and 5, which means it is a multiple of 10. So the last digit is 0.

The sum of the digits is 5. The number is a factor of 100, so the only possible solution is 50.

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