Question

How many integers in between 500 to 2020 (both inclusive) are multiple of 3 or 7?

Answer 1

Answer:

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Step-by-step explanation:

There are 17 integers b/w 1-300 which are divisible by 5 & 3 but not by 7

By taking the lcm of 5&3 we find that 1st integer divisible by both the no. Is 15 and the last one is 300 (as per the condition) hence by using the formula tn=a+(n-1)d we can find the no. Of integers divisible by 3 & 5 i.e 19 by using the same process we can get the no. Of integers divisible by 3,5 & 7 between 1-300 i.e 2

Now subtract both the obtained values i.e 19-2=17

Answer 2

Answer:

651

Step-by-step explanation:

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