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Find the sum of positive integers less t...

Find the sum of positive integers less than 400.

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KALYANI PUBLICATION-ARITHMATIC PROGRESSION-EXERCISE
  1. the following are the nth term of certain sequence. Determine whether ...

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  2. the following are the nth term of certain sequence. Determine whether ...

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  3. Find the sum of positive integers less than 400.

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  4. Find the sum 5+17+29+41......upto 20th term.

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  5. Find the sum 2+3fr1/2+5+6fr1/2+....... upto 25th term.

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  6. Find the sum 0.5+0.25+0-0.25....... upto 16th term.

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  7. Find the sum (1-1/n)+(1-2/n)+(1-3/n)+........upto n terms.

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  8. If a1=104,a24=196,find C.D.(=d) and sum upto 24th term(=S24)

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  9. If the last term is 994,the sum of the A.P series whose first term is ...

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  10. Find the number of terms of the A.P. 63,60,57......so that their sum i...

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  11. Find the number of terms of A.P. 64,60,56.....so that their sum is 544...

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  12. How many terms of the A.P. 9,17,25.....must be taken so that their sum...

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  13. Find the sum of all the natural number less than 100 which divisible b...

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  14. Find the sum of all three digit natural number which is divisible by 1...

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  15. In an A.P.,the sum of first n terms is 3n^2/2+5n/2.Find its 25th term...

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  16. In an A.P.,the sum of first n terms is 5n^2/2+3n/2.Find its 20th term...

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  17. Find the sum of all three digit numbers which leave the remainder 3 wh...

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  18. Find the sum of all two digit natural numbers which when divided by 3 ...

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  19. Find the sum of all two digit numbers greater than 50 which when divid...

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  20. If the sum of first n,2n,3n terms of an A.P. be S1,S2 and S3 respectiv...

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