Prime Time
Factor Frenzy
Greatest & Least
Power Up!
Mystery Numbers
100

The number 17. (Prime or Composite)

What is prime?

100
Factors of 12.

What are 1, 2, 3, 4, 6, and 12?

100

GCF of 6 and 9 

What is 3?

100

What is 3^2

What is 9?


100

I am even and between 20 and 30. I'm divisible by 6. 

What is 24?

200
The smallest prime number?
What is 2?
200
Multiples of 5 up to 30.

What are 5, 10, 15, 20, 25, and 30.

200

LCM of 4 and 10

What is 20?


200

What is 10^3?

What is 1000?


200

I am a multiple of 4 and 5 but not of 3.  

What is 20.  
300
All prime numbers between 10 and 20.
What are 11, 13, 17, and 19?
300

A number that has exactly 3 factors.

What is 4? (1, 2, 4 -- perfect squares of primes have 3 factors)

300

What is the GCF of 24, 36, and 48?

What is 12?

300

Which is greater: 5^2 or 2^5?

What is 2^5 = 32? (greater than 25)

300

I am a square number greater than 40 but less than 60.

What is 49?


400
Not a prime number: 29, 31, 35, 37.

What is 35? (5x7)

400

The factor pair of 36 that has the greatest difference?

What are 1 and 36?

400
The LCM of 3, 4, and 6.

What is 12?

400

What number has a square root of 12?

What is 144?

400

I have exactly 8 factors. I am less than 50.

What is 24? (1, 2, 3, 4, 6, 8, 12, 24)

500
If the sum of two primes is even, what must one of them be.

What is 2? (all other primes are odd, and odd + odd = even only if one is 2.)

500
Write two numbers that have 18 as a common multiple.

What are 6 and 9? or 9 and 18? or 3 and 6?

500

Two numbers have an LCM of 60 and a GCF of 6.  What could the numbers be?

What is 12 and 30? (GCF x LCM = product of numbers - 6 x 60 = 360 - 12 x 30 = 360)

500

Simplify 2^3 x 2^4.

What is 2^7 = 128?

500

I am a two-digit prime number.  The sum of my digits is 10. 

What is 37.  (3 + 7 = 10; 37 is prime)
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