92nd Problem 2016
Number Theory
Level
2
How many multiples of 13 are included between 12548 and 19987 both inclusive?
Check out the set: 2016 Problems .
The answer is 572.
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1 solution
1 3 1 9 9 8 7 = 1 5 3 7 . 4 6 1
1 3 1 2 5 4 8 = 9 6 5 , 2 3 0
So, the total number of multiples of 1 3 between the given two numbers are 1 5 3 7 − 9 6 5 = 5 7 2 □