Think-Top Educational Institute
Standard 4 · SEA Mathematics

Prime, Composite and Square Numbers

Count factors to sort numbers into prime and composite, learn the square numbers to 144 and their roots, and split numbers into prime factors. Each exercise marks itself as your child goes, explains the answer, and awards stars.

Practise this topic freeAll Standard 4 Maths topics
The Think-Top SEA practice app icon: Ms. Dumas waving inside a gold ring
What your child practises

Skills in this topic

Finding prime numbers up to 100Prime or compositeSquare numbers up to 144Square rootsPrime factor products
Free to try

6 free exercises in this topic

Square numbers
Sort the numbers
Match them up
Prime factor products
Find the mistake
Choose, order and explain

Plus adds 6 more exercises on this topic.

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Inside the app

How an exercise works

SEA practice app: Exercises inside a topic
Exercises inside a topic
SEA practice app: Instant feedback on every answer
Instant feedback on every answer
SEA practice app: Stars, ranks and badges
Stars, ranks and badges
Plus

Every topic has free exercises to start. Plus unlocks the full set and every mock paper for TT$150 per child per month (US$25), on up to 3 devices.

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More Standard 4 Maths topics

Number Patterns and Rules

Find the rule, fill the gaps and carry on the pattern, with numbers, fractions, decimals, dots and sticks.

9 free exercises

Want a teacher in the room as well?

Our small SEA classes in St. Augustine and online begin with a real diagnostic, so lessons start from exactly where your child is. Practice at home fits beautifully alongside.

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