Prime Time
Is 7 a prime number?
What is Yes.
Is 12 a composite number?
What is Yes.
List all the factors of 8.
What is 1, 2, 4, 8
Give the first 5 multiples of 2.
What is 2, 4, 6, 8, 10
What comes next? 5, 10, 15, 20, ___
What is 25
Which is prime: 9, 11, or 15?
What is 11
Which is composite: 13, 17, or 21?
What is 21.
List all the factors of 12
What is 1, 2, 3, 4, 6, 12
Give the first 5 multiples of 6.
What is 6, 12, 18, 24, 30
🔺 🔺 🟦 🔺 🔺 🟦 🔺 🔺 ___
What is 🟦
Name all the prime numbers between 10 and 20.
What is 11, 13, 17, 19
Why is 18 a composite number?
What is it has more than two factors (1, 2, 3, 6, 9, 18)
List all the factor pairs of 24.
What is 1×24, 2×12, 3×8, 4×6
Is 35 a multiple of 5? Explain.
What is Yes, 5×7=35
What is the rule? 7, 14, 21, 28, 35...
What is add 7
True or False: All odd numbers are prime. Explain.
What is False. Ex. 9 is composite.
Name 3 composite numbers between 20 and 30.
What is ... Possible answers include 21, 22, 24, 25, 26, 27, 28
Is 7 a factor of 42? How do you know?
What is Yes, because 7×6=42 or 42 is a multiple of 7.
What is the first common multiple of 4 and 6?
What is 12
🟩 🔺 🟩 🔺🔺 🟩 🔺🔺🔺 🟩 ___ What comes next?
🔺🔺🔺🔺
I am the only even prime number. What number am I?
What is 2.
I am between 20 and 30. My factors are 1, 5, and me. What number am I?
25
My factors are 1, 2, 4, 7, 14, and 28. What number am I?
What is 28.
I am less than 50 and a multiple of both 6 and 7. What number am I?
What is 42
🔵 🔺 ⭐ 🟩 repeats. What will the 25th shape be?
What is 🔵 circle, because the pattern repeats every 4 shapes. Positions 1, 5, 9, 13, 17, 21, and 25 are circles.