Brain teasers with answers for ages 8 to 10

20 questions

1. What number comes next? 4, 8, 12, 16, ?

   Choose from: 20, 17, 24, 18

   Show answer

   20. We add 4 each time: 16 + 4 = 20. These are the 4 times table.

2. Which number is the odd one out: 2, 4, 9, 12?

   Choose from: 4, 12, 2, 9

   Show answer

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

3. All birds have feathers. A parrot is a bird. What must be true about a parrot?

   Choose from: It can swim, It lives in water, It has fur, It has feathers

   Show answer

   It has feathers. If every bird has feathers and a parrot is a bird, then a parrot has feathers.

4. Which shape has 6 sides?

   Choose from: A triangle, A square, A pentagon, A hexagon

   Show answer

   A hexagon. A hexagon has 6 sides. Honeycomb cells are hexagons.

5. If yesterday was Sunday, what day is tomorrow?

   Choose from: Monday, Saturday, Tuesday, Wednesday

   Show answer

   Tuesday. If yesterday was Sunday, today is Monday, so tomorrow is Tuesday.

6. A shopkeeper has 50 mangoes. He sells 18 in the morning and 15 in the evening. How many are left?

   Choose from: 32, 17, 23, 33

   Show answer

   17. 18 + 15 = 33 sold, and 50 − 33 = 17 left.

7. How many sides do 3 triangles have altogether?

   Choose from: 3, 6, 9, 12

   Show answer

   9. Each triangle has 3 sides: 3 × 3 = 9.

8. Which number is the odd one out: 15, 25, 35, 42?

   Choose from: 25, 42, 35, 15

   Show answer

   42. 15, 25 and 35 are in the 5 times table. 42 is not.

9. How many months are there in a year?

   Choose from: 12, 52, 10, 7

   Show answer

   12. A year has 12 months, from January to December.

10. What is the opposite of “generous”?

    Choose from: Clever, Rich, Selfish, Kind

    Show answer

    Selfish. A generous person shares. A selfish person keeps things for themselves.

11. What is 4 × 6?

    Choose from: 28, 20, 10, 24

    Show answer

    24. 4 × 6 = 24.

12. How many sides does a pentagon have?

    Choose from: 8, 4, 6, 5

    Show answer

    5. A pentagon has 5 sides. “Penta” means five.

13. A bus leaves at 8:15 and the journey takes 30 minutes. When does it arrive?

    Choose from: 8:45, 8:50, 9:15, 8:30

    Show answer

    8:45. 8:15 + 30 minutes = 8:45.

14. Which number is the odd one out: 3, 6, 9, 10?

    Choose from: 3, 9, 6, 10

    Show answer

    10. 3, 6 and 9 are in the 3 times table. 10 is not.

15. All birds have feathers. A crow is a bird. What can we say for sure?

    Choose from: A crow has feathers, A crow is white, A crow has no wings, A crow can talk

    Show answer

    A crow has feathers. If all birds have feathers and a crow is a bird, a crow has feathers.

16. Up is to down as left is to what?

    Choose from: Top, Side, Back, Right

    Show answer

    Right. Up and down are opposites, and left and right are opposites.

17. What is double 25?

    Choose from: 52, 45, 75, 50

    Show answer

    50. 25 + 25 = 50.

18. What number is 10 more than 95?

    Choose from: 105, 115, 85, 95

    Show answer

    105. 95 + 10 = 105.

19. Which one is the odd one out: spider, ant, beetle, butterfly?

    Choose from: Ant, Spider, Beetle, Butterfly

    Show answer

    Spider. Ants, beetles and butterflies are insects with 6 legs. A spider has 8 legs.

20. What number comes next? 5, 6, 8, 11, 15, ?

    Choose from: 19, 18, 20, 21

    Show answer

    20. We add 1, 2, 3, 4 and then 5: 15 + 5 = 20.