Find the twenty fifth term of the A.P. : 12, 16, 20, 24, ..........
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Subba Rao started work in 1995 at an annual salary of Rs. 5000 and received an increment of Rs. 200 each year. In which year did his income reach Rs. 7000
Which term of the AP 121,117,113,.... is its first negative term?
Find the first term a1 and the common difference d of the arithmetic progression in which a2+a5−a3=10, a2+a9=17
Find the 12th term from the end of the AP: 2, 4, 6,..., 100.
In an arithmetic progression of which a is the first term. If the sum of the first ten terms is zero and the sum of next ten terms is −200 then find the value of a.
Find the sum of first n even natural numbers.
If S=2n[2a+(n−1)d] ; find d , when a=8,S=380 and n=10.
How many three-digit numbers are divisible by 7