nd the sum of all numbers lying between 201 and 424 which are divisible by 5.
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Answer:
a=205
a2=210
a3=215
an = 420
d=a2-a=5
an=a+(n-1)d
420=205+(n-1)*5
n=44
Sum= n/2(a+an)
22*625
13750 ans
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