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Odd one out puzzles for kids

In each list, three things belong together and one does not. Find the odd one out, then say why: that reason is the real puzzle.

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20 questions

  1. Which one is the odd one out: dog, cat, car, cow?Ages 5–7

    Choose from: Car, Dog, Cow, Cat

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    Car. A dog, a cat and a cow are animals. A car is not an animal.

  2. Which one is the odd one out: lion, tiger, eagle, leopard?Ages 8–10

    Choose from: Lion, Tiger, Leopard, Eagle

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    Eagle. Lions, tigers and leopards are big cats. An eagle is a bird.

  3. Which number is the odd one out: 16, 25, 36, 40?Ages 11–14

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    40. 16, 25 and 36 are square numbers (4², 5², 6²). 40 is not a square number.

  4. Which one is the odd one out: apple, banana, chair, mango?Ages 5–7

    Choose from: Chair, Mango, Banana, Apple

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    Chair. Apples, bananas and mangoes are fruits. You can't eat a chair!

  5. Which number is the odd one out: 2, 4, 9, 12?Ages 8–10

    Choose from: 4, 12, 2, 9

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    9. 2, 4 and 12 are even numbers. 9 is an odd number.

  6. Which one is the odd one out: oxygen, helium, water, nitrogen?Ages 11–14

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    Water. Oxygen, helium and nitrogen are elements. Water is a compound made of hydrogen and oxygen.

  7. Which one is the odd one out: shirt, shoes, spoon, socks?Ages 5–7

    Choose from: Shirt, Shoes, Socks, Spoon

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    Spoon. A shirt, shoes and socks are things you wear. A spoon is for eating.

  8. Which one is the odd one out: whale, dolphin, shark, seal?Ages 8–10

    Choose from: Shark, Dolphin, Seal, Whale

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    Shark. Whales, dolphins and seals are mammals that breathe air. A shark is a fish.

  9. Which number is the odd one out: 17, 23, 29, 33?Ages 11–14

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    33. 17, 23 and 29 are prime numbers. 33 is not prime, because 33 = 3 × 11.

  10. Which one is the odd one out: red, blue, green, table?Ages 5–7

    Choose from: Red, Table, Green, Blue

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    Table. Red, blue and green are colours. A table is a piece of furniture.

  11. Which one is the odd one out: Mercury, Venus, Moon, Mars?Ages 8–10

    Choose from: Venus, Moon, Mercury, Mars

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    Moon. Mercury, Venus and Mars are planets. The Moon goes around the Earth.

  12. Which one is the odd one out: copper, iron, silver, wood?Ages 11–14

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    Wood. Copper, iron and silver are metals. Wood is not.

  13. Which one is the odd one out: car, bus, train, banana?Ages 5–7

    Choose from: Banana, Bus, Car, Train

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    Banana. Cars, buses and trains are vehicles. A banana is a fruit.

  14. Which one is the odd one out: square, rectangle, triangle, cube?Ages 8–10

    Choose from: Square, Triangle, Cube, Rectangle

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    Cube. Squares, rectangles and triangles are flat shapes. A cube is solid (3D).

  15. Which one is the odd one out: kidney, liver, lung, femur?Ages 11–14

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    Femur. Kidneys, liver and lungs are organs. The femur is a bone (in your thigh).

  16. Which one is the odd one out: sun, moon, star, shoe?Ages 5–7

    Choose from: Shoe, Sun, Star, Moon

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    Shoe. The Sun, Moon and stars are in the sky. A shoe goes on your foot.

  17. Which word is the odd one out: run, jump, swim, blue?Ages 8–10

    Choose from: Jump, Blue, Run, Swim

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    Blue. Run, jump and swim are actions. Blue is a colour.

  18. Which one is the odd one out: 121, 144, 169, 196, 200?Ages 11–14

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    200. 121, 144, 169 and 196 are squares (11², 12², 13², 14²). 200 is not.

  19. Which one is the odd one out: cat, dog, parrot, cow?Ages 5–7

    Choose from: Dog, Cow, Cat, Parrot

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    Parrot. Cats, dogs and cows have four legs. A parrot is a bird with two legs.

  20. Which one is the odd one out: salt, sugar, sand, honey?Ages 8–10

    Choose from: Salt, Sugar, Sand, Honey

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    Sand. Salt, sugar and honey are foods. Sand is not.

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