Mystery Numbers
Probability
Measures of central tendency
Fractions
100

My value is even

The square of my value is less than 20

My value is greater than 2


The mystery number is...

what is 4

100

Express as a fraction the probability of drawing a white marble from a bag containing 8 black, 4 grey and 4 white marbles

What is 4/16 or 1/4

100

This measure of central tendency is calculated by adding all the numbers in a data set and then dividing by the count of numbers.

What is the mean

100

To add or subtract fractions, they must have this in common.

What is denominator

200

The sum of my digits is equal to fourteen

The product of my digits is equal to forty-nine.

what is 77

200

The Probability calculated from actually doing an experiment

What is experimental probability

200

This measure of central tendency is the middle number in a data set when the numbers are arranged in ascending order.

What is median

200

This is what you call a fraction that has a numerator greater than or equal to its denominator.

What is called improper fractions
300

My value is odd.

My value is a multiple of eleven.

n>20

n<40

What is 33

300

This is the term for an event that is certain not to happen, having a probability of 0.

What is an impossible event

300

If the numbers in a data set are 3, 7, 7, 9, 15, this is both the mode and the median

What is 7

300

 If you cut a pizza into 8 equal slices and eat 3, the fraction of the pizza you have eaten is this.

What is 3/8

400

All of my digits are even.

My hundreds digit is equal to four times my units digit.

The sum of my digits is equal to ten.

What is 802

400

The probability of an event that is certain to happen, such as drawing a heart from a full deck of hearts.

What is 1 or 100%

400

The mean of the data set {2, 4, 6, 8, 10} is this.

What is 6

400

 The simplified form of the fraction 15/45 is this.

What is 1/3

500

My thousands digit is equal to my units digit.

The sum of my digits is equal to two.

The product of my digits is equal to zero.

My hundreds digit is equal to my tens digit.

My thousands digit is greater than my tens digit.

What is 1001

500

This is the probability of rolling a number less than 5 on a 6-sided die.

What is 2/3 or approximately 66.67%

500

Out of the mean, median, and mode, this is the only one that can have more than one value for a given data set.

What is the mode

500

 If you have half a pie and divide it equally among four people, each person gets this fraction of the whole pie.

What is 1/8