Percents
Find the percent change from 280 to 126.
55%
You roll a regular sided di. What is the probability of rolling an odd number?
1/2
-16 = 4x - 12
x = -1
James ordered several pizzas that cost $12 each and paid a $5 delivery. He spend $53 total, how many pizzas did he order?
4 pizzas
The following are the math test scores for 10 students:
78, 85, 90, 92, 94, 96, 97, 98, 98, 100
Find the following: Median, Q1, Q3, IQR
Median: 95
Q1: 90
Q3: 98
IQR: 8
A baseball pitcher won 80% of the games he pitched. If he pitched 35 games, how many games did he win?
28 games
A jar contains 12 caramels, 7 mints and 16 dark chocolates. What is the probability of selecting a mint?
1/5
-5 = 6d - 7d + 4
9 = d
Ava bought some books for $8 each and also paid $10 for a library membership. She spent a total of $50, how many books did she buy?
5 books
These are the weekly allowances (in dollars) for 11 students:
5, 8, 10, 10, 12, 15, 15, 17, 18, 20, 25
Find the following: Mean, Median, Mode, Q1, Q3, IQR
Mean: 15.9
Median: 15
Mode: 10 and 15
Q1: 10
Q3: 18
IQR: 8
There are 28 students in a class. Sixteen of those students are men. What percent of the class are women? (Round to the nearest tenth)
42.9%
Suppose you draw two tennis balls at random from a bag containing seven pink, four white, three yellow, and two striped balls. Find the probability of picking a yellow then a pink without replacing. (Simplify)
7/80
2k + 36 = 6k - 12
k = 12
Liam starts with 100 points and earns 25 points per level he beats. Now he has 225 points, how many levels did he beat?
5 levels
A class recorded their shoe sizes:
6, 6.5, 7, 7, 7.5, 8, 8, 8.5, 9, 10, 10.5
Find the following: Median, Q1, Q3, IQR, and Range.
Is the data more spread out in the lower or upper half? Explain using IQR.
Median: 8
Q1: 7
Q3: 9.5
IQR: 2.5
Range: 4.5
It is more spread out in the upper half (8.5-10.5) compared to the lower half (6-7.5)
A student answered 86 problems on a test correctly and received a grade of 98%. How many total problems were on the test, if all the problems were worth the same number of points? (Round to the nearest whole number)
88 problems
There are 6 pennies, 9 nickels, and 3 dimes in a box. Find the probability of choosing one nickel and then a dime with replacement.
1/12
2d + 18 = 12 - 6(d + 7)
d = -6
Sophia earns $15 per hour and gets a $20 bonus each time she babysits. Last week, she earned $95. How many hours did she work?
5 hours
The minutes spend reading per day for 12 students are:
15, 20, 20, 25, 30, 30, 30, 35, 40, 45, 50, 60
Find the following: Mean (round to one decimal), Q1, Q3, IQR. Does the IQR tell you anything about how consistent the students' reading habits are?
Mean: 35.8
Q1: 22.5
Q3: 42.5
IQR: 20
A 20-minute spread in the middle 20% suggests some inconsistency in how long students read.
Pamela bought an electric drill at 85% off the regular price. She paid $32.89 for the drill. What was the regular price? (Round to the nearest cent)
$38.69
Steve reaches into a bag with 5 red marbles, 3 yellow, and 2 green, and randomly selects one. Then, he puts the marble back, and Sam reaches into the same bag and randomly selects a marble. What is the probability that both guys selected a yellow marble?
9/100
8(e - 5) = 2(3e - 8)
e = 12
Noah is selling ice cream cones for $3 each. He started with $24 and now has $72. How many ice cream cones did he sell?
16 ice cream cones
A group of students tracked how many pages they read in a week:
50, 52, 55, 58, 60, 62, 65, 68, 70, 120
Find the following: Median, Q1, Q3, IQR
Is 120 an outlier? Justify using the IQR rule: (A value is an outlier if it more than 1.5 x IQR above Q3 or below Q1)
Median: 61
Q1: 55
Q3: 68
IQR: 13
120 is an outlier