Prime or composite? Give a reason.
31
Prime: its only factors are 1 and 3135
Composite: 35 = 5 × 71
Neither: it has only one factor
Make 12 by multiplying.
How many ways can you find?
They all break down to 2 × 2 × 3
- Product
- The answer when numbers are multiplied.
- Prime factor
- A factor that is a prime number.
Write as a product of prime factors
Write as a product of prime factors
Write 28 as a product of prime factors
22 × 7
Write 45 as a product of prime factors
32 × 5
Write 28 as a product of prime factors
22 × 7
Write 50 as a product of prime factors
2 × 52
Write 28 as a product of prime factors
22 × 7
Write 63 as a product of prime factors
32 × 7
Write 28 as a product of prime factors
22 × 7
Write 66 as a product of prime factors
2 × 3 × 11
Write 28 as a product of prime factors
22 × 7
Write 90 as a product of prime factors
2 × 32 × 5
What is the smallest number that has three different prime factors?
30Jo says the prime factor decomposition of 24 is 2 × 3 × 4. What has she done wrong?
4 is not prime
Write 60 as a product of prime factors.
22 × 3 × 5Write 98 as a product of prime factors.
2 × 72Ola says 40 = 2 × 4 × 5 as a product of prime factors. Is she right? Explain.
No: 4 is not prime. 23 × 5
Exit tickets to print
