How many positive integers less than or equal to 1000 are common multiples of the three numbers 8,100, and 40

Question

How many positive integers less than or equal to 1000  are common multiples of the three numbers 8,100,  and 40

Reiny · Answer

The lowest multiple of 8, 100, and 40 is 200 so the number of multiples of 200 ≤ 1000 are 200, 400, 600, 800, and 1000 I count 5 of them