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Arithematic Progressions

Solve the equation – 4 + (–1) + 2 +…+ x = 437

Arithematic Progressions

The ratio of the 11^th term to the 18^th term of an AP is 2 : 3. Find the ratio of the 5^th term to the 21^st term, and also the ratio of the sum of the first five terms to the sum of the first 21 terms.

Arithematic Progressions

Find the sum of the integers between 100 and 200 that are

(i) divisible by 9(ii) not divisible by 9

Arithematic Progressions

An AP consists of 37 terms. The sum of the three middle most terms is 225 and the sum of the last three is 429. Find the AP.

Arithematic Progressions

The eighth term of an AP is half its second term and the eleventh term exceeds one third of its fourth term by 1. Find the 15^th term.

Arithematic Progressions

Find the

(i) sum of those integers between 1 and 500 which are multiples of 2 as well as of 5.

(ii) sum of those integers from 1 to 500 which are multiples of 2 as well as of 5 .

(iii) sum of those integers from 1 to 500 which are multiples of 2 or 5.

Arithematic Progressions

The sum of the first five terms of an AP and the sum of the first seven terms of the same AP is 167. If the sum of the first ten terms of this AP is 235, find the sum of its first twenty terms.

Arithematic Progressions

Solve the equation : 1 + 4 + 7 + 10 +…+ x =287

Arithematic Progressions

The sum of four consecutive numbers in an AP is 32 and the ratio of the product of the first and the last terms to the product of the two middle terms is 7 : 15. Find the numbers.

Arithematic Progressions

 Yasmeen  saves  Rs  32  during  the  first  month,  Rs  36  in  the  second  month  and Rs 40 in the third month. If she continues to save in this manner, in how many months will she save Rs 2000?