REVISION ASSIGNMENT 05 ( 27.01.2018)

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DASS AND BROWN WORLD SCHOOL

Class X                                      Revision assignment 05

1. If the seventh term of an AP is  and its ninth term is  , find its 63^rd term.Ans-1

2. The sum of the 4^th term and 8^th term of an AP is 24 and the sum of its 6^th and 10^th terms is 44. Find the first three terms of the AP.

3. Which term of the AP 3, 15, 27, 39,.............will be 120 more than its 21^st term ? ans- n=31

4. If 5 times the fifth term of an AP is equal to 8 times its eight term, show that its 13^th term is Zero.

5. In a given AP if p^th term is q and q^th term is p then show that the n^th term is ( p+q-n)

6. If the p^th , q^th and r^th terms of an AP be a,b,c respectively the show that

          a(q – r) + b(r – p)+c(p – q)=0 

7. Find the sum of two middle most terms of the AP  ans - 3

8. The 17^th term of AP is 5 more than twice its 8^th term . If the 11^th term of the AP is 43 , find its n^th

     term. Ans-4n – 1

9. Find the sum of first 100 even natural numbers which are divisible by 5. Ans – 50500

10 .The sum of first 6 terms of an AP is 42. The ratio of its 10^th term to 30^th term is 1:3 . Find the first and the 13the tem of the AP.

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