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A number is a multiple of 80 if the last 4 digits are a multiple of 80

  • The 1,000s digit is even and the last 3 digits are a multiple of 80
  • The 1,000s digit is odd and the last 3 digits are 40 times an odd number

It also works if the number is a multiple of 5 and 16 at the same time because 80 = 2^4 x 5 = 16 x 5

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More answers

Any multiples of 80 are divisible by 80.

Three examples: 80 / 80 = 1 : 160 / 80 = 2 : 800 / 80 = 10

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11y ago
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Q: What numbers are divisible by 80?
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