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How many four-digit numbers N = abcd satisfy all of the following conditions?

1. 4000 <= N < 6000

2. N is a multiple of 5.

3. N is not a mutlple of 3

 Jan 19, 2022
 #1
avatar+1353 
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There are 400 numbers that are divisible by 5 within the range. Of these, 133 of them are divisible by 15, so your answer is 400-133 = 267.

 Jan 19, 2022
 #2
avatar+1353 
+2

It can also be found here: https://web2.0calc.com/questions/math-problem_35879

 Jan 19, 2022

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