factors, multiples and primes for grade 4

 Factors, Multiples, and Primes Worksheet for Grade 4

Part 1: Factors

1. Find the factors of the following numbers: a) 12 Factors: __________

   b) 15 Factors: __________

   c) 20 Factors: __________

2. Write all the factor pairs for the numbers below: a) 8 Factor pairs: __________

   b) 18 Factor pairs: __________

Part 2: Multiples

1. Write the first five multiples of each number: a) 5 Multiples: __________

   b) 9 Multiples: __________

   c) 7 Multiples: __________

2. Find the common multiples of the numbers below: a) 4 and 6 Common multiples: __________

   b) 3 and 9 Common multiples: __________

Part 3: Prime or Composite?

1. Determine whether the following numbers are prime or composite: a) 7 Prime/Composite: __________

   b) 10 Prime/Composite: __________

   c) 13 Prime/Composite: __________

2. Write all the prime numbers between 1 and 20: Prime numbers: __________

Part 4: Factor Puzzles

Solve the factor puzzles. Fill in the missing numbers to complete each puzzle.

a) 12 = 2 × ___ b) 15 = ___ × 3 c) ___ × 5 = 25 d) 7 × ___ = 63

Part 5: Word Problems

1. John is planting trees in his garden. He plants trees at the following intervals: every 4th tree is an apple tree, and every 5th tree is a cherry tree. Which tree number will have both an apple tree and a cherry tree planted?

2. Lisa is arranging books on her shelf. She places books in the following order: 3 books per row, and she fills 4 rows. How many books did she place on the shelf?

3. There are 15 cupcakes to be shared equally among 3 friends. How many cupcakes will each friend get?

Bonus Challenge

1. Write down three different numbers that have exactly four factors each.

2. Find the smallest prime number that is also a multiple of 3.

Remember to show your work and use numbers, diagrams, or charts where necessary. Good luck!