Calculate the interquartile range of these scores:
14, 16, 16, 18, 18, 18, 19, 20, 21
3.5
100
What is Mr. Curran's first name?
Mark
200
A rectangle has an area of 24 square cm and a perimeter of 20cm. What is it's length and width?
6cm x 4cm
200
What is the distance between the points (1, -3) and (-2, 1)
5 units
200
Factorise 169x^2 - 144
(13x-12)(13x+12)
200
It has been claculated that the probabilty of a male birth is 0.48. At a large Sydney hospital, 1400 babies were born over a year. How many female babies would you expect?
728
200
What car does Ms. Brubacher drive?
Toyota Echo
300
A cylinder has a height of 10cm and a diameter of 3cm. What is it's surface area? Give your answer correct to 1 decimal place.
108.4 square cm
300
The midpoint of A(-3, 4) and B is (3, -1). What are the coordinates of the point B?
(3, -1)
300
Solve 2(5e + 2) + 3(2e - 9)=5(8e - 7)
e = 0.5
300
Ben needs to average 75 in his yearly examinations to be allowed to drive the family car. His average for his first four exams is 70. What mark must he score in his fifth and final exam to average
95
300
How many teachers teach maths at the school this year?
6
400
A sphere of radius r cm fits tightly into a cylinder. Find in simplest form, the ratio of the volume of the sphere to the volume of the cylinder.
2:3
400
What is the equation of the line that is perpendicular to
2x-y-7=0 through the point (0, -4)
y=-0.5x+4
400
Find the simultaneous solution for
4c + 7d = -3 and 3c - 4d = 7
c=1 and d=-1
400
In a kindergarten class of 40 children the average foot length was calculated to be 10.5cm with a standrad deviation of 0.5cm. What percentage of lengths are less than 10cm?
16%
400
How old is Ms. Brubacher?
34
500
A cone has a surface area of 78pi square cm and a diameter of 12cm. Find the slant height.
7cm
500
Find the value of k if the lines 3x-4y=10 and 5x+ky-1=0 are parallel.
k=-20/3
500
Molly and her grandmother share the same birthday. On their last birthday their combined ages totalled 97 years, and Molly's grandmother was 5 years more than 3 times Molly's age. How old will they be on their next birthday?
Molly will turn 24 and her grandmother will be 75 years old.
500
One hundred tickets are sold in a raffle. John purchases 2 tickets, hoping to win both first and second prize. Find the probability that he wins at least one prize.