Question

how many multiples of 6 and their between 100 and 1000 find the sum of these numbers​

Answer 1

Step-by-step explanation:

least multiple of 6 between 100 and 1000=102

highest multiple of 6 between 100 and 1000=996

a=102, d=6, an=996

an=a+(n-1)d

996=102+(n-1)6

996-102=(n-1)6

894/6=n-1

149+1=n

150=n

now, Sn=n/2(a+an)

=150/2(102+996)

=75(1098)

=82350

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