
MATH REVISION
Authored by sujatha selvan
Mathematics
9th Grade
Used 5+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3√6 + 4√6 is equal to:
6√6
7√6
4√12
7√12
Answer explanation
3√6 + 4√6 = (3 + 4)√6 = 7√6
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The number obtained on rationalising the denominator of 1/ (√7 – 2) is
(√7+2)/3
(√7-2)/3
(√7+2)/5
(√7+2)/45
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
One of the linear factors of 3x2+8x+5 is
(x-4)
(x+2)
(x-2)
(x+1)
Answer explanation
3x2+8x+5 = 3x2+ 3x+5x+5
3x2+8x+5 = 3x(x+1)+5(x+1)
3x2+8x+5 = (3x+5)(x+1)
Therefore, (x+1) is one of the factors of 3x2+8x+5.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If the perpendicular distance of a point P from the x-axis is 7 units and the foot of the perpendicular lies on the negative direction of x-axis, then the point P has:
y-coordinate = 7 or –7 only
y-coordinate = 7 only
y-coordinate = –7 only
x-coordinate = –7
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Abscissa of all the points on the x-axis is
0
1
2
ANY NUMBER
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The linear equation 3x-11y=10 has:
Unique solution
Two solutions
Infinitely many solutions
No solutions
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Find the value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y = k.
5
6
7
8
Answer explanation
2x + 3y = k
k=2(1)+3(2) = 2+6 = 8
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