Dubai Stem Olympiad 2019-20 Round 2 | Junior Category
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- 1.
Which is not a type of simple machine?
- A.
Spring
- B.
Pulley
- C.
Lever
- D.
Wedge
Correct Answer
A. Spring -
- 2.
A flowchart shows which of the following?
- A.
Algorithm
- B.
Robots
- C.
Water Flow
- D.
None of the above
Correct Answer
A. Algorithm -
- 3.
How many lines of symmetry does a square have?
- A.
4
- B.
1
- C.
2
- D.
3
Correct Answer
A. 4 -
- 4.
If a wooden box is in a state of rest, this means that forces on it are:
- A.
Balanced
- B.
Unbalanced
- C.
Weak
- D.
Strong
Correct Answer
A. Balanced -
- 5.
X is the number of parallel lines in the following parallelogram. Y is the number of perpendicular lines in this shape. What is the value of X multiplied by Y.
- A.
0
- B.
1
- C.
2
- D.
3
Correct Answer
A. 0 -
- 6.
Which of the following sensors could be used in a set of automatic doors.
- A.
Temperature Sensor
- B.
Gyroscopic Sensor
- C.
Ultrasonic Sensor
- D.
PH Sensor
Correct Answer
C. Ultrasonic Sensor -
- 7.
Kenny has enough paint to cover X square cm. What is the smallest value that X should be if he only wants to paint the two smallest faces of this shape.
- A.
24
- B.
12
- C.
18
- D.
14
Correct Answer
A. 24 -
- 8.
Mary builds and programs a walking robot. However, this robot is unable to balance well and falls over easily. There is likely to be an issue with its:
- A.
Temperature Sensor
- B.
Gyro Sensor
- C.
Colour Sensor
- D.
Sound Sensor
Correct Answer
B. Gyro Sensor -
- 9.
Martha is 8 years old. John is 5 years older than Martha and 3 years older than Bob. How old is Bob in months?
- A.
120
- B.
110
- C.
10
- D.
25
Correct Answer
A. 120 -
- 10.
Which is true about the amount of work that must be done to lift a bucket using the pulley shown compared to lifting the same bucket without a pulley?
- A.
Less work is done when lifting with the pulley.
- B.
Less work is done when lifting without the pulley.
- C.
The same amount of work is done lifting with or without the pulley.
- D.
None of the above
Correct Answer
A. Less work is done when lifting with the pulley. -
- 11.
A machine has a load, fulcrum and force. What type of machine is it?
- A.
Simple Machine
- B.
Complex Machine
- C.
Compound Machine
- D.
Advanced Machine
Correct Answer
A. Simple Machine -
- 12.
What is the smaller angle between the hands of a clock at 10:30?
- A.
135
- B.
120
- C.
180
- D.
150
Correct Answer
A. 135 -
- 13.
Henry uses a dog leash of length X meters. Gavin has a dog leash that is 5 times longer. Sophia wants a leash that is of equal length as Henry's and Gavin's combined. What is the length of Sophia's leash?
- A.
5X
- B.
X
- C.
10X
- D.
6X
Correct Answer
D. 6XExplanation
To find the length of Sophia's leash, we need to add the lengths of Henry's and Gavin's leashes. Since we know Gavin's leash is 5 times longer than Henry's, we can write this as:
Henry's leash: X meters
Gavin's leash: 5X meters
Sophia's leash = Henry's leash + Gavin's leash
Sophia's leash = X + 5X
Now, we can simplify the equation:
Sophia's leash = 6X
So, Sophia's leash is 6 times the length of Henry's leash. If you have a specific length for Henry's leash (in meters), you can substitute it into the equation to find the exact length of Sophia's leash.Rate this question:
-
- 14.
X is the sum of all interior angles in an equilateral triangle. Y is the number of lines of symmetry for an equilateral triangle. What is the value of X+Y? *Diagram not drawn to scale
- A.
183
- B.
182
- C.
93
- D.
91
Correct Answer
A. 183 -
- 15.
What is 3/4 added to 12/48
- A.
1
- B.
0
- C.
15/48
- D.
36/48
Correct Answer
A. 1 -
- 16.
Sam wants to ensure that the length of a wall is between 90 and 120. The length should also be an even number that is a multiple of 11. The sum of the digits of this length should be 2. What should be the length of Sam's wall?
- A.
110
- B.
120
- C.
116
- D.
None of the above
Correct Answer
A. 110 -
- 17.
A barcode scanner at the supermarket is a type of:
- A.
Simple Machine
- B.
Autonomous Device
- C.
Input Device
- D.
Output Device
Correct Answer
C. Input Device -
- 18.
If a technician tells you that you have a faulty router in your apartment, you are likely to have difficulty accessing which of the following?
- A.
The internet
- B.
Water from a faucet
- C.
The fridge
- D.
Your television
Correct Answer
A. The internet -
- 19.
Luke’s Mom works in a busy office. She sends an email with a file added to it. The file is:
- A.
An attachment
- B.
A signature
- C.
A reply
- D.
A text
Correct Answer
A. An attachment -
- 20.
Jack throws a ball into the swimming pool. He sees that it floats. What is the reason for it to float?
- A.
Because of the presence of air in the ball.
- B.
Because of the size of the ball.
- C.
Because of the movement of the ball.
- D.
Because of the shape of the ball.
Correct Answer
A. Because of the presence of air in the ball. -
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Apr 09, 2024Quiz Edited by
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Dec 24, 2019Quiz Created by
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