MCQ

MCQ 11 Mark

The degree of the polynomial $3 x^3 y-5 x y^4-2 x+1$ is

✓
$5$
B
$4$
C
$3$
D
$2$

Answer

Correct option: A.

$5$

The degree of the polynomial
$3 x^3 y-5 x y^4-2 x+1$ is of $-5 x y^4$
$=1+4$
$=5$

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MCQ 21 Mark

The number of sides in a pattern having 3 hexagons arranged in a row as shown in the given figure is

A
18
B
17
C
16
D
15

Answer

Number of sides are = 16 $\text{(c)}$

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MCQ 31 Mark

The value of the expression $\frac{5}{3} x^2+1$ when $x=-2$ is

A
$\frac{-17}{3}$
B
$\frac{-7}{3}$
C
$\frac{21}{3}$
✓
$\frac{23}{3}$

Answer

Correct option: D.

$\frac{23}{3}$

$\frac{5}{3} x^2+1$
$=\frac{5}{3}(-2)^2+1$
$=\frac{5}{3} \times 4+1$
$=\frac{20}{3}+1$
$=\frac{23}{3}$

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MCQ 41 Mark

On subtracting $7x + 5y – 3$ from $5y – 3x – 9,$ we get

A
$10 x+6$
✓
$-10 x-6$
C
$10 x+10 y-12$
D
$-10 x-12$

Answer

Correct option: B.

$-10 x-6$

$(5 y-3 x-9)-(7 x+5 y-3)$
$=5 y-3 x-9-7 x-5 y+3$
$=-10 x-6$

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MCQ 51 Mark

$-x y-(-5 x y)$ is equal to

A
$-6 x y$
B
$6 x y$
C
$-4 x y$
D
$4 x y$

Answer

$-x y-(-5 x y)=-x y+5 x y=4 x y\ \ \ (d)$

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MCQ 61 Mark

The value of the expression $x^3+y^3$ when $x=2$ and $y=-2$ is

A
$0$
B
8
C
16
D
$-16$

Answer

Value of $x^3+y^3=(2)^3+(-2)^3=8-8=0$ (a)

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MCQ 71 Mark

The number of $($unlike$)$ terms in the expression $3 x y^2+2 y^2 z-y^2 x+y(x z+y z)- 5$

A
$3$
✓
$4$
C
$5$
D
$6$

Answer

Correct option: B.

$4$

The number of unlike terms in the expression
$=3 x y^2+2 y^2 z-y^2 x+y(x z+y z)-5$
$=3 x y^2+2 y^2 z-y^2 x+x y z+y^2 z-5$
$=2 x y^2+3 y^2 z^2+x y z-5$
$=4$

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MCQ 81 Mark

Identify the binomial out of the following :

✓
$3 x y^2+5 y-x^2 y$
B
$2 x^2 y-5 y-2 x^2 y$
C
$3 x y^2+5 y-x y^2$
D
$x y+y z+z x$

Answer

Correct option: A.

$3 x y^2+5 y-x^2 y$

(a) $3 x y^2+5 y-x^2 y$ trinomial
(b) $2 x^2 y-5 y-2 x^2 y=-5 y$ monomial
(c) $3 x y^2+5 y-x y^2=2 x y 2+5 y$ binomial $\text{(c)}$

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MCQ 91 Mark

The like terms is the expressions $3 x(3-2 y)$ and $2\left(x y+x^2\right)$ are

A
$9 x$ and $2 x^2$
B
$-6 x y$ and $2 x y$
C
$9 x$ and $2 x y$
D
$-6 x y$ and $2 x^2$

Answer

Like terms in the expression
$3 x(3-2 y)=9 x-6 x y \text { and } 2\left(x y+x^2\right)=2 x y+2 x^2$ are $-6 x y$ and $2 x y$ (b)

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MCQ 101 Mark

Which of the following is a pair of like terms?

A
$-5 x y, 5 x$
B
$-5 x y, 3yz$
C
$-5 x y$, $-5 y$
D
$-5 x y$, $7 y x$

Answer

$-5 xy , 7 yx$ is a pair of like terms. (d)

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MCQ 111 Mark

The coefficient of $5 a^2$ in $-5 a^3 b c$ is

A
$-b c$
B
$a^2 b c$
C
$-a^2 b c$
D
$-a b c$

Answer

Co-efficient of $5 a^2$ in $-5 a^3 b c$ is -abc (d)

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MCQ 121 Mark

The expression $7 x-5\left(x^2+y^2\right)$ is a

A
monomial
B
binomial
C
trinomial
D
none of these

Answer

$7 x-5\left(x^2+y^2\right)=7 x-5 x^2-5 y^2$
It is trinomial. $\text{(c)}$

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MCQ 131 Mark

The algebraic expression for the statement 'Thrice square of a number $x$ subtracted from five times the sum of $y$ and $2^{\prime}$ is

A
$5 y+2-3 x^2$
B
$3 x^2-(5 y+2)$
C
$5(y+2)-3 x^2$
D
$5(y+2)-(3 x)^2$

Answer

For the statement, thrice square of a number x subtracted from five times the sum of y and 2 is $5(y+2)-3 x^2$-$\text{(c)}$

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