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Find the Rule
A card of numbers with one hidden behind a ?. Every row follows the same rule, such as adding the same step or doubling. Spot the rule from the complete rows and use it to fill the gap.
What it trains
- Spotting number patterns
- Logical reasoning
- Testing an idea against several examples
Questions
What kinds of rules are there?
Easy uses rows that grow by the same step or double. Normal adds sums, differences and × 3. From Hard the rule can run down the columns, and Expert uses two-step rules such as (a + b) × 2.