9th
grade

Mathematics

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Layla Deen

3 years

Mathematics

9th

grade

Mathematics

Layla Deen

53
plays

20 questions

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1. Multiple Choice
1 minute
1 pt
It takes 20 workers 6 hours to build a wall. How much time would 30 workers need to complete the job?
4 hours
16 hours
40 hours
2 hours
2. Multiple Choice
1 minute
1 pt
It takes 10 waitresses 3 hours to serve food. How much food would be served if 5 more waitresses were hired?
2 hours
1 hour
8 hours
3 hours
3. Multiple Choice
1 minute
1 pt
Factorize the equation
$x^2+11x+18$
$\left(x+9\right)\left(x+2\right)$
$\left(x-9\right)\left(x-2\right)$
$\left(x+6\right)\left(x+3\right)$
$\left(x-6\right)\left(x-5\right)$
4. Multiple Choice
1 minute
1 pt
Use the quadratic formula to solve this equation
(Hint:
$\frac{-b+-\sqrt{b^2-4ac}}{2a}$ )
x= -3.14 or x= 4.14
x= 3.14 or x= 4.14
x=-4.14 or x= -3.14
5. Multiple Choice
1 minute
1 pt
Set A=(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
Set X=(2, 4, 6, 8, 10)
Set Y=(1, 3, 5, 7, 9, 10)
Find
$X\cap Y$
10
(0)
6. Multiple Choice
1 minute
1 pt
Inverse proportion between two values is shown when one __________ as the other ____________.
Increases, decreases
Decreases, decreases
Increases, increases
7. Multiple Choice
1 minute
1 pt
Direct proportion between two values is shown when one _________________ as the other _________________.
Increases/decreases, increases/decreases
Increases, increases
Decreases, decreases
8. Multiple Choice
1 minute
1 pt
These are last week's test scores
3, 4, 5, 5, 5, 5, 6, 7, 7, 7, 8, 9, 10, 10
Calculate the mean score.
6.5
7.5
6
8.5
9. Multiple Choice
1 minute
1 pt
Two vertically opposite angles are drawn. One is
$2x+20\degree$ big and the other is $x+30\degree$ big. Calculate their values.
x=10, so they both are equal to 40 degrees
x=40, so they both are equal to 10 degrees
10. Multiple Choice
1 minute
1 pt
$2x+4>6$
Solve the inequality
$x>1$
$x<1$
$x\ge1$
$x\le1$
11. Multiple Choice
1 minute
1 pt
$6-3x<3$
Solve the inequality
$x>1$
$x<1$
12. Multiple Choice
1 minute
1 pt
$'\in'$ means _____________.
Is an element of
Is not an element of
13. Multiple Choice
1 minute
1 pt
$'\notin'$ means ______________.
Is not an element of
Is an element of
14. Multiple Choice
1 minute
1 pt
$'\subseteq'$ refers to __________________.
An improper set
A proper set
15. Multiple Choice
1 minute
1 pt
$'\subset'$ refers to ______________.
A proper set
An empty set
An improper set
16. Multiple Choice
1 minute
1 pt
Order the numbers 0.1, 0.01, 1.1, 1.01 from smallest to largest
0.01, 0.1, 1.01, 1.1
1.1, 1.01, 0.1, 0.01
1.01, 1.1, 0.1, 0.01
17. Multiple Choice
1 minute
1 pt
Add two more items to set A
Set A=(Sharjah, Dubai, Abu Dhabi,...)
Fujairah, Ajman
New York, Las Vegas
Darwin, Melbourne
18. Multiple Choice
1 minute
1 pt
Add two more items to set X
Set X=(Alex, Andrew,...)
Anders, Alan
Mason, Mark
Amy, Amelia
19. Multiple Choice
1 minute
1 pt
$'\cup'$ refers to ____________.
Union
Intersection
20. Multiple Choice
1 minute
1 pt
$'\cap'$ refers to _____________.
Intersection
Union
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