Digital deck · 3rd–4th Grade · 30 questions
Prime and Composite Numbers Digital Activity | 3rd–4th Grade
See every page before you buy- Zero prep needed
- Instant download
- Yours forever
- Follows a sequence
- Print and go
- Broken file? We fix or refund
32 pages — about 14¢ a page.
Add all 3 together: 15% off every item here (code TOGETHER15 applied for you).
Prime and Composite Numbers for 3rd to 4th grade: 30 question slides with a type-in answer box, plus an answer key slide.
What’s inside this download
- 30 question slides, one question per slide
- A type-in answer box on every question
- A title slide and an answer key slide at the end
- One .pptx file — opens in Google Slides and PowerPoint
Why choose this over a free activity
- Larger numbers that need a real check
- Targets the odd-equals-prime idea
- Keys label each number, so the odd-means-prime idea can be checked against 9 and 15
- No printing — works on a laptop, tablet or classroom screen
License and file format
- One .pptx file; upload it to Google Drive to open it in Google Slides
- One teacher or one household. Use it with your own students, this year and next
- Sharing the file itself needs a separate license
- Digital download — nothing ships
How do I get the files?
- The download link is on the order page the moment you pay, and in your inbox at the same time
- Re-download from that link any time — no account needed
- Wrong or broken file? Email support@pencillane.com and we fix it or refund you
Why get the bundle
The problem
71 is prime, but 9 is not, and both are odd
Many children believe every odd number is prime. Deciding takes a quick check for factors, not a glance at the last digit.
Odd means prime
9, 15 and 21 are odd, yet 3 divides each one. Children who equate odd with prime get these wrong.
The special cases
1 is neither prime nor composite, and 2 is the only even prime. These exceptions need to be named, not guessed.
Larger numbers need a method
To decide about 71 or 89, a child has to test small divisors like 2, 3, 5 and 7, rather than trust a hunch.
Each question gives a number and asks prime or composite. Children test for a factor other than 1 and the number itself, and use arrays or facts to say why.
What’s inside
30 questions, one per slide.
Students type straight into the box — no printing, no cutting.
Prime and Composite Numbers
Written for 3rd to 4th grade.
Title to answer key
A title slide first, the answer key last.
Google Slides & PowerPoint
One .pptx file that opens in both.
Look inside
One question per slide, with a box to type the answer.
How it works
Ready before the printer warms up.
-
1
Download
Check out, and your download link is in your inbox and on screen in seconds. One PowerPoint file you can open in Google Slides.
-
2
Open
Upload it to Google Drive and open it with Google Slides, or open it in PowerPoint.
-
3
Assign
Share it with your class. Students type an answer on each slide, and you check against the key.
Outcomes
Sort numbers as prime or composite
Look for a factor besides 1 and itself.
- 71
- 89
- 17
- 113
- 163
- 67
- 191
Who it’s for
Built for the kitchen table and the classroom.
Parents & homeschool
Make arrays with counters. A number that only makes one row, like 7, is prime. Try 9, 12 and 17.
Teachers
Fits fourth grade after factors and multiples.
Number-theory practice
Students who know their times tables can use them to rule numbers out quickly.
Questions
Before you buy.
Does the set include larger primes?
Yes. Numbers such as 71 and 89 appear, so children must check divisors, not assume.
What do I need to know first?
Multiplication facts and the idea of a factor. Factors and Multiples is a good lead-in.
How do I get the file?
The download link appears right after checkout and lands in your inbox at the same time. One PowerPoint file you can open in Google Slides.
Can I share it with my class?
Yes — one teacher can use it with their own students, this year and next. Sharing the file with other teachers needs a separate license.
Do I need Google Slides?
No. The file is a PowerPoint (.pptx). It opens in PowerPoint, and in Google Slides once you upload it to Google Drive.
What if it isn’t right for us?
Email support@pencillane.com within 30 days and we refund the full $4.50. No form, no questions.
Test for factors, then decide
Prime and Composite Numbers for 3rd to 4th grade, ready to assign.
Get it — $4.50