How many numbers between 11 to 111 are the multiples of both 2 and 5?
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Any even number is a multiple of 2 while any number ending in 5 or 0 is a multiple of 5, therefore for a number to be a multiple of BOTH 5 and 2 it'd have to end in 0.
We just need to take all of the numbers between 11 and 11 that end in 0:
20
30
40
50
60
70
80
90
100
110
These are 10 numbers so the answer to your question is 10!
We just need to take all of the numbers between 11 and 11 that end in 0:
20
30
40
50
60
70
80
90
100
110
These are 10 numbers so the answer to your question is 10!
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