Find the sum of all numbers from 150 to 200 which are divisible by 8
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Answer:
first term = 152
common difference = 8
last term=200
=》l = a+(n-1)d
=》200=152+(n-1)8
=》200-152=8n-8
=》48+8=8n
=》n=56/8
=》n=7
Now, sum of terms in an A.P=n/2(a+l)
=7/2(152+200)
=7/2×252
=7×126
=882
Thus the sum of terms from 150 to 200 divisible by 8 is 882
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