Consider the sequence of three digit numbers, which are multiples of 9 a)What is the first term of the sequence ? b)What is the last term of this sequence ? c)How many numbers are there in this sequence ? d)Find the sum of the numbers.
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Correct option is
C
100
Smallest and largest 3 digit number multiplied by 9 are 108 and 999
By AP
a=108 a
n
=999 d=9 n=?
999=108+(n−1)9
n=100.
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