Little detectives · 32/50 · Ages 8–10
The growing number trail
Free · No ads · No behavioral tracking. No account needed; progress stays in this browser. Privacy for families
Fox sees 2, 4, 6, 8 on trail signs. In this puzzle, the rule is “add two.” Say the rule before jumping to the next sign.
What you will discover
- A growing pattern changes by a stated rule.
- A short sequence can fit more than one rule, so check the puzzle’s rule.
English vocabulary
- rule
- quy luật
- next
- tiếp theo
Let’s play
Use “add 2”: 2, 4, 6, 8, __
See the explanation
8 + 2 = 10 under the stated rule.
Practise touch typing
Place your hands on F and J and type this sentence using ten fingers.
I add two to find the next number.
Two little quiz questions
1. What is the difference between 6 and 8?
- 1
- 2
- 4
Answer and explanation
2. 8 − 6 = 2, so the step increases by two.
2. Why do we state the rule?
- To make the intended pattern clear
- To make numbers disappear
- Because no other rule can ever fit
Answer and explanation
To make the intended pattern clear. A few terms alone do not always determine one unique rule.