Math Circles Prime Time Worksheet With Answers - Grade 6 - University Of Waterloo - 2015

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Faculty of Mathematics
Centre for Education in
Waterloo, Ontario N2L 3G1
Mathematics and Computing
Grade 6 Math Circles
March 10/11, 2015
Lights, Camera, Primes!
Today, we’re going to talk about a special type of number. Whether this is your first or tenth
time hearing about this type of number, there’s always something new to learn. Welcome to
Prime [Number] Time!
Warm-Up
Try to answer the following 7 questions in 3 minutes.
1. Identify the following numbers as either composite, prime, or neither:
(a) 1
neither
(b) 2
prime
(c) 82
composite
(d) 47
prime
(e) 73
prime
(f) 37
prime
(g) 77
composite
2. Find the prime factorization of the following numbers:
(a) 100
2
2
5
5
(b) 18
2
3
3
(c) 73
73
(d) 66
2
3
11
1

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