REVISION ASSIGNMENT 03 ( 25.01.2018)

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                              DASS AND BROWN WORLD SCHOOL

Class X                                   Revision assignment 03

1.       Use Euclid’s algorithm to find the HCF of 272 and 1032.     ans-8

2.       Show that one and only one out of n, n+2 , n+4 is divisible by 3, where n is any positive integer.

3.       The HCF of two number is 23 and their LCM is 1449. If one of the number is 161, find the other .  ans- 207

4.       A sweetseller has 42 kaju barfis and 150 badam burfis. He wants to stack them in such a way that each stack has the same number, and they take up the least area of the tray. How many of these can be placed in each stack? How many stacks are formed ?  ans- 30,19

5.       Prove that square root 11  is irrational number .

6.       What real number should be subtracted form the polynomial ( 3x³+10x²-14x+9 so that 3x-2 divides its exactly?  Ans – 5

7.       Find all the zeros of the polynomial ( 2x⁴- 11x³+ 7x²+ 13x - 7 ) , it being given that two of its zeros are 3+ and 3-      ans- 3+, 3- ,1,

8.       If ( a –b) ,a & (a+b) are zeros of the polynomial 2x³-6x²+5x-7, write the value of a .  ans- 1

9.       Draw the graph of the following equations on the same graph paper ,

2x+y=2

2x+y=6.

Find the coordinates of the vertices of the trapezium formed by these lines. Also, find the area of the trapezium so formed.

10.   Solve for x and y

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