MULTIPLES
FACTORS
PRIME NUMBERS
MYSTERY #
100
List the first 5 multiples of 15
What is 15, 30, 45, 60, 75
100
the GCF of 18 and 24
What is 6
100
Which is a prime number? 60, 61, 69, or 70?
What is 61
100
My prime factorization is 2^3 x 5
What is 40
200
The LCM of 6 and 10
What is 30
200
The GCF of 12, 16, 20
What is 4
200
Is 3x4x7 the prime factorization of 84? Explain why.
NO. 4 is NOT a prime number
200
Vinny's age is a common factor of 68 and 102. He is a teenager. How old is he?
What is 17
300
Every 9th customer at best buy wins a free CD and every 12th customer wins a dvd. What is the first number customer that will win both?
What is 36th
300
The GCF of 65 and 78
What is 13
300
Which is the prime factorization of 250? a) 2x5x25 b) 2x5x5x5 c)5x50 d) 5x5x10
What is B
300
I am the smallest prime number that is a factor of 765
What is 3
400
The LCM of 36 and 45
What is 180
400
The GCF of 28, 42, and 56
What is 14
400
The prime factorization of 110?
What is 2x5x11
400
I am divisible by ten. I am smaller than 8^2. my prime factorization is a string of 4 numbers and 3 of them are the same prime number.
What is 40
500
Four orbiting planets are orbiting around a distant star. One takes 6 earth years to complete one orbit, one takes 9 earth years, one takes 15 earth years and the last takes 18 earth years. If all four planets are alligned in 2010, when is the next year they will all be alligned again?
What is 2100 (the LCM is 90)
500
Judy had 36 prizes and 24 balloons. What is the greatest number of children she can invite to her party so that each child gets an equal number of prizes and balloons?
What is 12
500
Find the prime factorization of 975
What is 3x5x5x13
500
I am divisible by 5 but do not end in 0. My prime factorization is a string of 3 numbers. I am a 2-digit number that is greater than 7^2.
What is 75
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