2) Find the value of k, so that 3k + 7, 2k +5, 2k + 7 are in A.P (k= -4)
3) Find the 15th term from the end of the A.P: 3, 5, 7,………, 201(173)
4) Find the 11th term from the end of the A.P: 10, 7, 4,……, - 62 (-32)
5) If Sn, the sum of first n terms of an A.P is given by Sn = 3n2 – 4n, then find its nthterm
(6n – 7)
6) The sum of n terms of an A.P. is 3n2 + 5n. Find the A.P. Hence, find its 16th term
(6n + 2, 98)
7) In the following A.P. find the missing term -, 38, -, - , - , -22
8) Find the sum of all natural numbers less than 100 which are divisible by 6 (816)
9) Find the sum of 3 digit numbers which are not divisible by 7 (424214)
10) Find the sum of all three digit numbers which leave the remainder 3 when divided by 5 (99090)
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