Read the clues carefully and find the number you are looking for!
Here is how to do it:
Write the numbers (for example from 1 to 20) on a sheet of paper. Then you read
the clues and cross out the numbers that do not fit.
1. Read the first clue, cross out all numbers that do not fit.
2. Read the next clue, cross out more numbers.
3. In the end only one number is left!
Example:
• I am bigger than 3, so you can cross out the numbers 1, 2 and 3.
• I am smaller than 6, so you can cross out the numbers 6, 7, 8, 9 and 10.
• The 4 and the 5 are left.
• I am even, so you can share the number fairly between 2 children
so that no candy is left over.
(With 4 each child gets 2, with 5 one is left over.)
→ What is left: 4
Example
- 7
What does this exercise practice?
This task builds logical reasoning: children learn to apply conditions one after another and rule out possibilities step by step until only one answer remains.
Common pitfalls
Children often guess instead of reasoning. Show the 'crossing-out method': write down all numbers and cross them out purposefully after each clue. That makes the thinking visible and easy to check.
How to practice at home
Take turns thinking of a number from 1 to 20 and give clues: bigger than 10, odd, smaller than 15. The other person asks yes-no questions and narrows it down. Allow at most three questions.
Related: Even & Odd, Order numbers