mackwolf7014 mackwolf7014
  • 11-01-2020
  • Computers and Technology
contestada

For how many integer values of $n$ between 1 and 1000 inclusive does the decimal representation of $\frac{n}{1400}$ terminate?

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aaregbe
aaregbe aaregbe
  • 11-01-2020

Answer:

142 integers

Explanation:

For the given expression "n/1400", there exists a terminating expansion if and on if 2 and 5 are in the denominator. Therefore:

The denominator "1400" can be broken down into (2^3)*(5^2)*7. Then we need a number that can be divided by 7 and is between 1 and 1000. The number is 994 and the number of possible integer values = 994/7 = 142.

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