ASSIGNMENT 03_18.10.2018

           DASS AND BROWN WORLD SCHOOL

Class X      ASSIGNMENT NO -03 (18.10.2018) 

1.     Find the sum of odd positive integers between 1 and 199.

2.     How many terms of the A.P. 22, 20, 18, _____ should be taken so that their sum is zero?

3.      4k + 8, 2k 2 + 3k + 6, 3k 2 + 4k + 4 are the angles of a triangle. These form an A.P. Find value of k.

4.      If 11 times of 11th term is equal to 17 times of 17th term of an A.P. find its 28th term.

5.     The fourth term of an A.P. is equal to 3 times the first term and the seventh term exceeds twice the third term by 1. Find the first term and common difference of the A.P.

6.     Find the middle term of the A.P. 20, 16, 12, …… , –176.

7.      Find the number of terms of the A.P. 57, 54, 51, ______ so that their sum is 570. Explain the double answer.

8.     Using substitution method solve the below equations
x-2y+300=0, 6x-y-70=0

9.     Using elimination method solve the equations  x+y=5  ,2x-3y=4

10.                        Simplify  120-40 – ( -40+30 +30-20)

Date of submission :- 22.10.2018