S.chand class 6 Mathematics Chapter 13 Exercise 13B

  Exercise 13B

Question 1

Find the value of each expression using the given values.

(i) $\frac{a b}{c}$ if $a=5, b=6$ and $c=10$

(ii) $\frac{x}{3}+8 y$, if $x=24$ and $y=2$

(iii) $2 x-y+3 z$, if $x=4, y=7$ and $z=2$

(iv) $\frac{p+6 q}{5 p-3 q}$, if $p=6$ and $q=2$

Question 2

If $x=3, y=2$ and $z=5$, find the value of

(i) $\frac{x^{2}}{9}+\frac{z^{2}}{25}$

(ii) $x^{2} y+x y^{2}$

(iii) $6(x+3 y)-(5 z-x)$

Question 3

What is the value of $3 x+4 y-6$, when $x=2 \frac{1}{3}$ and $y=4 \frac{3}{4}$ ?

Question 4

Evaluate $3 a+2 b+c$, when $a=1.2, b=3.7$ and $c=1.4 ?$

Multiple Choice Question (MCQ) 

Tick (✔) the correct option.

Question 5

The value of $b-a-8$ when $b=-3$ and $a=-11$ is

(a) $-22$

(b) 16

(c) 0

(d) $-16$