MEDIUM
10th ICSE
IMPORTANT
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Find the sum of first 25 terms of  an AP, whose nth term is 1-4n.

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Important Questions on Arithmetic and Geometric Progression

MEDIUM
10th ICSE
IMPORTANT
Find the sum of first 21 terms of an AP, whose 2nd term is 8 and 4th term is 4.
MEDIUM
10th ICSE
IMPORTANT
Find the sum of first 17 terms of an AP whose 4th and 9th terms are -15 and -30, respectively.
HARD
10th ICSE
IMPORTANT
If sum of first 6 terms of an AP is 36 and that of the first 16 terms is 256, then find the sum of first 10 terms.
HARD
10th ICSE
IMPORTANT
If the sum of first p terms of an A.P. is q and the sum of first q terms is p, then find the sum of first (p+q) terms.
MEDIUM
10th ICSE
IMPORTANT
The sum of the first five terms and the sum of the first seven terms of an AP is167 .If the sum of the first ten terms of this AP is 235, then find the sum of its first twenty terms.
MEDIUM
10th ICSE
IMPORTANT

Find the number of terms of the following AP, 64, 60, 56,... having sum 544.

MEDIUM
10th ICSE
IMPORTANT

Find the number of terms of the following AP.

9, 17, 25, ... having sum 636?

MEDIUM
10th ICSE
IMPORTANT

Find the number of terms of the following AP.

- 7, - 4, - 1, .. having sum 210