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10th Tamil Nadu Board
IMPORTANT
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The sum to nth  term of any A.P. is of the form pn2+qn+r where p, q, r are some constants.

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Important Questions on Numbers And Sequences

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10th Tamil Nadu Board
IMPORTANT
If the sum of first n odd natural numbers is nk, find the value of k.
EASY
10th Tamil Nadu Board
IMPORTANT
What is the sum of first n even natural numbers?
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10th Tamil Nadu Board
IMPORTANT

Find the sum of A.P 3, 7, 11... up to 40 terms.

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10th Tamil Nadu Board
IMPORTANT

Find the sum of A.P. 102, 97, 92, ...up to 27 terms.

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10th Tamil Nadu Board
IMPORTANT

Find the sum of A.P. 6+13+20++97

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10th Tamil Nadu Board
IMPORTANT
How many consecutive odd integers beginning with 5 will sum to 480?
MEDIUM
10th Tamil Nadu Board
IMPORTANT
Find the sum of first 28 terms of an A.P., whose nth  term is 4n-3
MEDIUM
10th Tamil Nadu Board
IMPORTANT
The sum of first n terms of a certain series is given as 2n2-3n. Show that the series is an A.P.