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Mixed exercises
{{exercise_number}}. There are \latex{ 5 } pairs of blue and \latex{ 3 } pairs of black socks in the washing machine.
- At least how many socks do you have to take out from the washing machine to make sure you have one pair of the same colour?
- At least how many socks do you have to take out to make sure you have a pair of blue socks?
{{exercise_number}}. A maths teacher evaluated the final exams. She made a table that included how many students got each mark and what percentage of the class they corresponded to.
marks
number of students
percentage of all students
A
\latex{ 5 }
B
C
D
\latex{ 3 }
\latex{ 2 }
F
\latex{ 12 }%
\latex{ 28 }%
Complete the table. Make a pie chart and calculate the average of the class.
{{exercise_number}}. Match the descriptions with the corresponding graphs.
- Before a corner kick, a football player runs in front of the goal, moving closer and farther from it. The \latex{ x }-axis shows the time, while the \latex{ y }-axis shows the distance of the player from the goal.
- Mom is making fruit soup. Since it is a hot summer day, she wants to serve it cold. To accelerate the cooling process, she puts the bowl of soup into a container with room-temperature water before putting it into the fridge. She takes the soup out of the refrigerator right before lunch. The \latex{ x }-axis shows the time passed, while the \latex{ y }-axis represents the temperature of the soup.
- A tap was not turned off properly, so it kept dripping at a constant rate. Later, it was turned off properly and turned on again. The \latex{ x }-axis shows the time passed, while the \latex{ y }-axis represents the volume of the running water.
- Ben was walking to the bus stop. When he saw that the bus was coming, he started running but could not catch it, so he had to wait for the next one. The \latex{ x }-axis shows the time passed, while the \latex{ y }-axis represents the distance covered by Ben.
1.
2.
4.
3.
\latex{ time }
\latex{ time }
\latex{ time }
\latex{ time }
