Q. 5 B4.5( 2 Votes )

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Answer :

Starting from 50 the first number divisible by 6 is 54, this series will go forward as 60, 66 and so on


And moving back from 350 the last number will be 348


We know
tn = a + (n-1)d


348 = 54 + (n-1)6


348-54 = 6n-6


6n = 300


n = 50


t15 = 54 + (15-1)6


t15 = 138


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