Sequences
Triangular and square numbers
Prime and composite numbers
Median and mode
RANDOM!
100
1, 5, 9, 13... What is the term-to-term rule?
+4
100
Which type of number has a term rule of +1, +2, +3, +4....
Triangular
100
What are the definitions for composite and prime numbers?
Prime number - has exactly 2 factors (1 and itself)
Composite number - has more than 2 factors
100
How do you find the median?
1. order the numbers from smallest to biggest
2. cross out to find the middle number
100
Do triangular numbers make an isosceles, scalene, or equilateral triangle?
equilateral triangle
200
33, 27, _______, 15, _______, _______
21, 9, 3
200
What are all the square numbers until 100?
1, 4, 9, 16, 25, 36, 49, 64, 81, 100
200
How many square numbers from
1^2 to 10^2
are prime?
NONE!
200
What is mode? Can there be more than one mode?
Yes
200
Can even numbers be prime numbers?
NEVER. All even numbers have a factor of 2.
300
Peter starts counting from 2 by 4's. Will Peter say 48 in the sequence?
No
300
What are all the triangular numbers until 100?
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91
300
How many factors does 30 have?
1 x 30 = 30, 2 x 15 = 30, 3 x 10 = 30, 5 x 6 = 30
8 factors!
300
Which ball are you most likely going to take out?
A green ball
300
What is a number that has more than 2 factors?
What is a number that has exactly 2 factors?
SPELL CORRECTLY!
Composite and prime.
400
1, 4, 7, 10... What is the 55th term in the sequence? Show me the equation to find the answer.
1 + 54 x 3 = 162
400
Name 2 numbers that are a square number AND odd.
Name another 2 numbers that are a triangular number AND even.
1, 9, 25, 49, 81
6, 10, 28, 36, 66
400
Find TWO solutions:
Add 2 prime numbers together to 40
37 + 3
29 + 11
23 + 17
400
Find the median, mode, and range for the following number set:
11, 8, 7, 9, 10, 7, 10, 10, 8, 8 , 11
Median: 9
Mode: 8
400
Add another number to the number set to make the median 8
3, 1, 10, 8, 3, 2, 12, 15
any number above 8
500
32
500
RIDDLE:
I am an even number less than 50.
I am a square number.
I am a triangular number.
I am a composite number.
36
500
I am a prime number. I am less than 30. I am more one more than a multiple of 6. The sum of my digits is a 2 digit number.
19.
500
A shop sells 3 different sizes of coffee cups. Size 1, 2 and 3. Find the mode, the median. If the seller can only sell one size cup, should they sell the mode or median?
1, 2, 3, 2, 3, 1, 1, 2, 2, 3, 3, 1, 3
Mode: 3
500
Find the median and mode:
550g, 320g, 1kg, 550g, 320g, 2kg, 320g, 500g
Median: 535g
Mode: 320g