Question

How many multiples of 9 lies between 700 to 800

Answer 1

Answer:

Here series will be = 306, 315, 324, 333, ........693

so we have the first term a = 306 and d = 9 and last term l = 693

693 =306 + (n-1)

77 = 34 + (n-1)

n = 77 - 34 + 1

= 44

sum = n/2 a + l

=44/2(306+693)

=22(999)

=21978

Step-by-step explanation:

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