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19. The sum of first 14 terms of an A.P. is 1050 and its 14th term is 140. Find the 20th term.

1.    The sum of first 14 terms of an A.P. is 1050 and its 14^th term is 140. Find the 20^th term.

18. How many multiples of 4 lie between 10 and 250?

1.   How many multiples of 4 lie between 10 and 250?

17. Which term of the sequence 3, 8, 13, ……………. Is 78?

1.   Which term of the sequence 3, 8, 13, ……………. Is 78?

16. How many terms of the series 18+15+12+……………. When added give 45?

1.   How many terms of the series 18+15+12+……………. When added give 45?

15. The 6th term of an A.P. is 16 and the 14th term is 32. Determine the 36th term.

1.   The 6^th term of an A.P. is 16 and the 14^th term is 32. Determine the 36^th term.

14. Split 207 into three parts such that these parts are in A.p. and the product of the two smaller parts is 4623.

1.   Split 207 into three parts such that these parts are in A.p. and the product of the two smaller parts is 4623.