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Math Mati City and Davao Oriental Division
Quiz by johner
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​Lighthouses are towers with a light beacon on top. Lighthouses assist sea ships in finding their way at night when they are sailing close to the shore. A lighthouse beacon sends out light flashes with a regular fixed pattern. Every lighthouse has its own pattern. In the diagram below you see the pattern of a certain lighthouse. The light flashes alternate with dark periods.
Note:
It is a regular pattern. After some time the pattern repeats itself. The time taken by one complete cycle of a pattern, before it starts to repeat, is called the period. When you find the period of a pattern, it is easy to extend the diagram for the next seconds or minutes or even hours.
Which of the following could be the period of the pattern of this lighthouse?
5
12
3
2
​Lighthouses are towers with a light beacon on top. Lighthouses assist sea ships in finding their way at night when they are sailing close to the shore. A lighthouse beacon sends out light flashes with a regular fixed pattern. Every lighthouse has its own pattern. In the diagram below you see the pattern of a certain lighthouse. The light flashes alternate with dark periods.
Note:
It is a regular pattern. After some time the pattern repeats itself. The time taken by one complete cycle of a pattern, before it starts to repeat, is called the period. When you find the period of a pattern, it is easy to extend the diagram for the next seconds or minutes or even hours.
For how many seconds does the lighthouse send out light flashes in 1 minute?
24
20
12
4
Lighthouses are towers with a light beacon on top. Lighthouses assist sea ships in finding their way at night when they are sailing close to the shore. A lighthouse beacon sends out light flashes with a regular fixed pattern. Every lighthouse has its own pattern. In the diagram below you see the pattern of a certain lighthouse. The light flashes alternate with dark periods.
Note:
It is a regular pattern. After some time the pattern repeats itself. The time taken by one complete cycle of a pattern, before it starts to repeat, is called the period. When you find the period of a pattern, it is easy to extend the diagram for the next seconds or minutes or even hours.
Which of the following could be the period of the pattern of this lighthouse?
Lighthouses are towers with a light beacon on top. Lighthouses assist sea ships in finding their way at night when they are sailing close to the shore. A lighthouse beacon sends out light flashes with a regular fixed pattern. Every lighthouse has its own pattern. In the diagram below you see the pattern of a certain lighthouse. The light flashes alternate with dark periods.
Note:
It is a regular pattern. After some time the pattern repeats itself. The time taken by one complete cycle of a pattern, before it starts to repeat, is called the period. When you find the period of a pattern, it is easy to extend the diagram for the next seconds or minutes or even hours.
For how many seconds does the lighthouse send out light flashes in 1 minute?
Space station Mir remained in orbit for 15 years and circled Earth some 86 500 times during its time in space. The longest stay of one cosmonaut in the Mir was around 680 days.
Approximately how many times did this cosmonaut fly around Earth?
A game in a booth at a spring fair involves using a spinner first. Then, if the spinner stops on an even number, the player is allowed to pick a marble from a bag. The spinner and the marbles in the bag are represented in the diagram below.
Prizes are given when a black marble is picked. Sue plays the game once.
How likely is it that Sue will win a prize?
Peter has to take 80 mg of a drug to control his blood pressure. The following graph shows the initial amount of the drug, and the amount that remains active in Peter’s blood after one, two, three and four days.
How much of the drug remains active at the end of the first day?
From the graph for the previous question it can be seen that each day, about the same proportion of the previous day’s drug remains active in Peter’s blood.
At the end of each day which of the following is the approximate percentage of the previous day’s drug that remains active?
For a rock concert a rectangular field of size 100 m by 50 m was reserved for the audience. The concert was completely sold out and the field was full with all the fans standing.
Which one of the following is likely to be the best estimate of the total number of people attending the concert?
In the year 2018, it was found that around 140,000 people visited the museum from 1st October to 20thDecember. On an average, how many people visited it daily in that period (approx.)?
What was the value of fruit juice exported from Zedland in 2000?
On a particular day, the weather forecast predicts that from 12 noon to 6 pm the chance of rainfall is 30%.
Which of the following statements is the best interpretation of this forecast?