Logic Puzzles for Kids: Free Printable Puzzles with Answers

Published November 3, 2026

Logic puzzles for kids are short problems that can be solved by careful reasoning alone: who owns which pet, which box is heaviest, who is telling the truth. Below are 12 free puzzles we wrote for this page, sorted from easy to harder, with answers and short explanations at the end. Print the page or read the puzzles aloud and solve them together.

You’ll also find tips on helping without giving the answer away, and ideas for making your own puzzles.

How to use these puzzles

  • Start one level below where you think your child is. An easy win builds confidence for the harder ones.
  • Keep paper and a pencil nearby. Drawing a quick table or a line of names is half the trick.
  • Do one or two at a time. Five minutes of real thinking beats twenty minutes of frustration.
  • Ask “How do you know?” The explanation matters more than the answer. A lucky guess that can’t be explained isn’t solved yet.

Tip: When your child gets stuck, ask a question instead of giving a hint: “What do we know for sure?” or “Which clue have we not used yet?”

Easy logic puzzles for kids (ages 5–7)

Read these aloud for younger children. Most can be solved with fingers or a quick drawing.

Puzzle 1: Three pets

Mia, Leo and Sam each have one pet: a cat, a dog or a fish. Each pet belongs to a different child.

  • Mia’s pet has no fur.
  • Leo is allergic to cats.

Who has which pet?

Puzzle 2: What comes next?

Red, blue, blue, red, blue, blue, red, blue, blue, …

What color comes next?

Puzzle 3: The line

Ana, Ben and Cal stand in a line.

  • Ana is in front of Ben.
  • Ben is in front of Cal.

Who is at the front? Who is at the back?

Puzzle 4: Mystery number

I am a number. If you add 3 to me, you get 10. What number am I?

Medium logic puzzles for kids (ages 8–10)

These need a little more organizing. Encourage your child to draw a grid or list.

Puzzle 5: Lunchboxes

Ella, Noah and Zoe each bring a different snack (an apple, pretzels or yogurt) in a different lunchbox (red, green or blue).

  1. The child with the pretzels has a blue lunchbox.
  2. Zoe’s lunchbox is green.
  3. Ella does not eat yogurt.
  4. Noah’s lunchbox is not red.

Who has which snack and which lunchbox?

Puzzle 6: Heavy boxes

There are four boxes: A, B, C and D.

  • A is heavier than B.
  • C is lighter than B.
  • D is heavier than A.

Put the boxes in order from heaviest to lightest.

Puzzle 7: The impossible sentence

On an island, knights always tell the truth and knaves always lie. Every islander is one or the other.

A visitor hears an islander say: “I am a knave.”

Could anyone on the island say this? Why or why not?

Puzzle 8: Mini number grid

Fill in the empty squares so that every row, every column and every 2 by 2 box contains the numbers 1, 2, 3 and 4 once each.
1 2 _ 4
_ 4 1 _
_ 1 4 _
4 _ _ 1

The four 2 by 2 boxes are the top-left, top-right, bottom-left and bottom-right quarters of the grid.

Logic puzzles for clever kids (ages 10+)

These are for children who breeze through the first two sections. Some adults find them tricky too.

Puzzle 9: Two islanders

Back on the island of knights (always truthful) and knaves (always lying), you meet Tam and Rue.

Tam says: “Rue and I are both knaves.”

What is Tam? What is Rue?

Puzzle 10: Sock drawer

A drawer holds 6 red socks and 6 blue socks, all mixed up. The light is off, so you can’t see colors. What is the smallest number of socks you must take out to be sure you have a matching pair?

Puzzle 11: Secret two-digit number

  • I am a two-digit number.
  • My digits add up to 9.
  • I am even.
  • My tens digit is 5 more than my ones digit.

What number am I?

Puzzle 12: Brother and sister

Ben is twice as old as his sister. In 4 years, their ages will add up to 20. How old are they now?

Answers and explanations

Cover this section when you print the page, or fold the paper over.

  1. Three pets: Mia has the fish (the only pet without fur). Leo can’t have the cat, so he has the dog. Sam has the cat.
  2. What comes next? Red. The pattern is “red, blue, blue” repeated.
  3. The line: Ana is at the front and Cal is at the back. The order is Ana, Ben, Cal.
  4. Mystery number: 7, because 7 + 3 = 10.
  5. Lunchboxes: Zoe’s box is green (clue 2). Noah’s isn’t red, and green is taken, so Noah’s is blue. That means Noah has the pretzels (clue 1). Ella’s box is red. Ella doesn’t eat yogurt and the pretzels are taken, so Ella has the apple, and Zoe has the yogurt.
    • Ella: apple, red. Noah: pretzels, blue. Zoe: yogurt, green.
  6. Heavy boxes: D, A, B, C. D is heavier than A, A is heavier than B, and B is heavier than C.
  7. The impossible sentence: No one could say it. A knight would be telling a lie, which knights never do. A knave would be telling the truth, which knaves never do.
  8. Mini number grid:
1 2 3 4
3 4 1 2
2 1 4 3
4 3 2 1
  1. Two islanders: Tam is a knave and Rue is a knight. If Tam were a knight, the sentence would be true, so Tam would be a knave, which is impossible. So Tam is a knave and the sentence is false. “Both of us are knaves” is false, and Tam is a knave, so Rue must be a knight.
  2. Sock drawer: 3 socks. With only two colors, the first two socks might not match, but the third must match one of them.
  3. Secret number: 72. If the ones digit is x, the tens digit is x + 5, and together they make 2x + 5 = 9, so x = 2. The number is 72, which is even.
  4. Brother and sister: The sister is 4 and Ben is 8. In 4 years they will be 8 and 12, which add up to 20.

How to help a child who gets stuck

Getting stuck is part of the fun. A few moves help without spoiling it:

  • Act it out. Use toys, coins or sticky notes for the people or boxes in the puzzle.
  • Draw a grid. For puzzles like the lunchboxes, put names down the side and options across the top. Mark an X for “no” and a check for “yes.”
  • Try a guess and test it. “Let’s pretend Tam is a knight. What happens?” Testing a guess and finding it impossible is real logic.
  • Take a break. Many kids solve a puzzle the next morning after leaving it overnight.

Where knights and knaves puzzles come from

Puzzles about islanders who always tell the truth or always lie were made famous by the logician and puzzle writer Raymond Smullyan. His puzzle book What Is the Name of This Book? came out in 1978 and is full of knights and knaves. If your child loves Puzzles 7 and 9, there are many more where those came from, and they get much harder.

Make your own logic puzzles for kids

Once your child has solved a few, invite them to write one for you. It is often harder, and more fun, than solving.

  1. Start from the answer. Decide who owns what first, for example three friends and three favorite fruits.
  2. Write clues one at a time. After each clue, check: could the answer still be something else?
  3. Stop when only one answer fits. If two answers work, add a clue. If a clue isn’t needed, cut it.
  4. Test it on someone. A sibling or grandparent makes a great tester.

Logic puzzles for kids online and printable

If you look for more puzzles online, a few things help:

  • Choose puzzles that come with answers, so you can check them.
  • Mix types: grid puzzles, number grids, patterns and truth-teller puzzles each stretch thinking in a different way.
  • For number grid practice, our free Schulte table is a quick attention game you can play online.
  • For more game ideas, see our guide to brain games for kids.

Logic puzzles are good practice at careful thinking, and kids get better at the types of puzzles they solve. Don’t expect puzzles on their own to raise school grades. Treat them as a fun way to think together.

A structured option

Our Emotional Intelligence and Life Skills page describes Skills for Success, a 12-month program by educator Shamil Ahmadullin for ages 7–10 and 11–15, already taught in Russian. One of its six modules is critical thinking. The English edition is in development, and you can join the waitlist on the program page.

Sources

The puzzles on this page are our own wording; Puzzles 7, 9 and 10 follow classic patterns. The facts about knights and knaves puzzles come from:

Emotional Intelligence and Life Skills for Kids: English edition coming soon

Programs that help children understand emotions, communicate, build confidence and think critically. Two tracks for ages 4–12 and 7–15.

Try our free tools for kids →