Factors Of A Number — Interactive Lesson (Year 5)

What two numbers multiply together to make 36 — and how many pairs can you find? This 19-slide interactive lesson teaches pupils to find the factors of a number using factor pairs.

Factors of a Number for Year 5 Maths

Pupils learn that factors come in pairs and that a number’s factors multiply together to make it, using division to check that a factor divides in exactly with no remainder. They see that 30 ÷ 5 = 6 and 30 ÷ 6 = 5, so 5 and 6 are a factor pair of 30, alongside the other pairs 1 and 30, 2 and 15, and 3 and 10, then apply this by clicking the correct factor pairs of 56, 81, 18 and 63 from a set of possible pairs.

What’s Included

• 19-slide interactive lesson on finding factor pairs
• Learning objectives linking factors to multiplication and division
• A worked example finding all the factor pairs of 30
• Click-the-factor-pairs activities for 56, 81, 18 and 63
• Instant feedback on every activity

Key Benefits for Students

• Shows factors as a checkable division fact, not a guessing game
• Builds fluency finding multiple factor pairs for one number
• Practises with a range of two-digit numbers
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A concise lesson that fits a single session
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A dependable foundation before multiples and prime numbers

Love this? You’ll love…

• Counting In Powers Of 10 — Interactive Lesson & Activities (Year 5)
• Introduction To Percentages — Interactive Lesson (Year 5)
• Introduction to Square Numbers — Interactive Lesson (Year 5)

A dependable addition to a Year 5 number properties topic, giving pupils a clear, checkable method for finding factor pairs before moving on to multiples and prime numbers. This groundwork underpins simplifying fractions and other Year 5 number work.

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FAQs

What year group is this for?
Year 5 (ages 9–10), KS2.

Does it explain how to check a factor pair?
Yes — using division with no remainder.

Is it self-marking?
Yes, with instant feedback on the questions.