Grades 2–3
Shape Sudoku Puzzles
Sudoku with shapes instead of numbers: four 4 by 4 puzzles that each have exactly one answer.
Classroom activity · Logic puzzles and brain teasers
Logic Grid: After-School Clubs
Two 4 by 4 logic grids with five clues and three clues. Kids cross out, then reason out the rest.
- Grade level
- Grades 4–5
- Time
- About 25 minutes
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- Logical reasoning, Problem solving, Persistence, Explaining thinking
What kids do
“Read the clues. Put an X when the answer is no and an O when it is yes. Each person has just one, and no two people share.”
Printed on the sheet:
- 1. Hana is not in the chess club or the coding club.
- 2. Gus and Ivy are not in the drama club.
- 3. Jon is in the coding club or the chess club.
- 4. Ivy is not in the chess club or the art club.
- 5. Gus is not in the coding club.
- 1. Kim and Leo did not eat soup.
- 2. Nia ate tacos.
- 3. Leo did not eat pizza.
Words on this sheet
artchesscodingCluesdramaGusHanaIvyJonpizzaKimLeosouptacossaladMaxNia
Teacher tip
Have kids mark each yes with a circle and each no with an X.
How to use it
- Let kids work with a partner and explain their thinking.
- Start with an easier puzzle before the harder ones.
- Let kids work with a partner so they talk through their thinking.
Watch for
Frustration on hard puzzles. Give one clue at a time as a hint.
Talk about it
- How did you know you were right?
- What would you change to make it harder?
Take it further
Post a puzzle of the week on the board.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
More logic puzzles and brain teasers
Grades 2–3
Odd One Out Brain Teasers
Eight rows of four: circle the one that does not belong and explain why. Words, numbers and shapes.
Grades 3–4
Logic Grid: The Pet Show
A 3 by 3 and a 4 by 4 logic grid about a pet show: who brought which pet, and which pet won which prize.
Grades 3–5
Shape Math Puzzles
Four puzzles where shapes stand for numbers: if star + star = 10, what is a star? A first taste of algebra.
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