Find the sum of all integers from 1 to 100 which are mulriples of 2 and 5.
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Hey!!
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The numbers which are multiples of 2 and 5 are
10 20 30 .... 100
They form an AP
with common difference = 10
and number of terms are 10
so sum= n/2[a+l]
where a = first term and l = last term
S= 10/2×[10+100]
=5×110
=550
________________
Thanks!!
_______________
The numbers which are multiples of 2 and 5 are
10 20 30 .... 100
They form an AP
with common difference = 10
and number of terms are 10
so sum= n/2[a+l]
where a = first term and l = last term
S= 10/2×[10+100]
=5×110
=550
________________
Thanks!!
raushan2592003:
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kya
answer to 550 h
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