Write 42 as a product of its prime factors. Give your answer in the form a × b × . . . and write the factors in ascending order.
2x3x7
If you use the cards shown to write 132 as a product of its prime factors, which three cards will you have left over?
3,5,7
Is this correct? Explain
Yes - Every number can be broken down in to prime factors
What are the common factors?
5, b, 5b
5 is a factor of both 10 and 15. Which other number is a common factor of 10 and 15?
1
Use the factor tree to write 36 as a product of its prime factors. Give your answer in the form a × b × . . . and write the factors in ascending order.
2 × 2 × 3 × 3
What is the next number in this sequence?
25
How old is Freddie?
14
What are the first five square numbers?
1, 4, 9, 16, 25
What is the missing prime factor?
7
Which factor of 18 is missing from the table?
6
Write 26 as a product of it's prime factors
13 x 2
Which number has more than 1 prime factor
12 = 2, 3,
Select the numbers that are prime factors of both 294 and 315
3,7
Which student is wrong?
Chantelle
Which of the following numbers is a multiple of both 6 and 9?
18
What is the missing prime factor
13
Which number is a prime number?
19
Is this always, sometimes, or never a multiple of 4. Why?
Sometimes... when x=2, no as answer = 0
Which number (other than 1) is a common factor of 14 and 35?
7
What number is represented by the prime factor tree
27