In an A.P., if a = -5, l = 21 and S = 200, then n is equal to
50
40
32
25
19 Likes
Answered By
1 Like
In an A.P. if a = 1, an = 20 and Sn = 399, then n is
19
21
38
42
The sum of first five multiples of 3 is
45
55
65
75
The number of two digit numbers which are divisible by 3 is
33
31
30
29