find sum of all natural numbers between 10 and 250 which are exactly divisible by 7
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List of natural numbers from 10 to 250 divisible by 4 is:
12,16,....,248
a=12
d=4
a
n
=248
a
n
=a+(n−1)d
248=12+(n−1)4
236=(n−1)4
59=n−1
∴n=60
Therefore there are 60 numbers which are divisible by 4 between 10 and 250.
List of natural numbers from 10 to 250 divisible by 4 is:
12,16,....,248
a=12
d=4
a
n
=248
a
n
=a+(n−1)d
248=12+(n−1)4
236=(n−1)4
59=n−1
∴n=60
Therefore there are 60 numbers which are divisible by 4 between 10 and 250.
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