ARITHMETIC PROGRESSIONS Test

The first term of an AP is 5, the last term is 45 and the sum is 400. The number of terms is

The sum of (a + b), (a – b), (a – 3b), …….. to 22nd term is

The sum of odd numbers between 0 and 50 is

If 1 + 4 + 7 + ……. + k = 287, then the value of ‘k’ is

200 logs are stacked in a such a way that 20 logs in the bottom row, 19 logs in the next row, 18 logs in the row next to it and so on. The total number of rows is

200 logs are stacked in a such a way that 20 logs in the bottom row, 19 logs in the next row, 18 logs in the row next to it and so on. The number of logs in the top row is

A sum of Rs.700 is to be used to award 7 prizes. If each prize is Rs.20 less than its preceding prize, then the value of the first prize is

In an A.P., if \({S_n} = 3{n^2} + 2n\), then the value of ‘d’ is

In an A.P., if \({S_n} = 3{n^2} + 2n\), then the value of ‘\({a_n}\)’ is

The famous mathematician associated with finding the sum of the first 100 natural numbers is

If \(\frac{{3 + 5 + 7 + .............n{\text{ }}terms}}{{5 + 8 + 11 + .........10{\text{ }}terms}} = 7\), then the value of ‘n’ is

How many terms of the A.P. 25, 22, 19, 16, ……must be added to get the sum 116?

From your pocket money, you save Re.1 on the first day, Rs.2 on the second day, Rs.3 on the third day and so on. The amount of money saved by you in the month of May 2013 is

The sum of all the three digit numbers which leaves the remainder 3, when divided by 5 is

If the angles of a triangle are in AP, then one of its angles is