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Number Theory

Level 26 - mastery

Rule for 7

6 visual blocks - structure tests

1

Read the shape

Level 26 visual plan for Rule for 7
Look for digit and factor structure. Rule for 7.

Look for digit and factor structure. Rule for 7.

2

Pick the method

Number Theory: block 2 Visual guide level shape Rule for 7Pick the methodUse divisibility, remainders, GCD, or LCM. image-first, then practice
Use divisibility, remainders, GCD, or LCM.

Use divisibility, remainders, GCD, or LCM.

3

First move

Number Theory: block 3 Visual guide level shape Rule for 7First moveRun the cheapest test first. image-first, then practice
Run the cheapest test first.

Run the cheapest test first.

4

Check

Number Theory: block 4 Visual guide level shape Rule for 7CheckUse GCD x LCM = product when relevant. image-first, then practice
Use GCD x LCM = product when relevant.

Use GCD x LCM = product when relevant.

5

Play the mode

Number Theory: block 5 Visual guide level shape Rule for 7Play the modeBeat the clock with checked answers. image-first, then practice
Beat the clock with checked answers.

Beat the clock with checked answers.

6

Watch-out

Number Theory: block 6 Visual guide level shape Rule for 7Watch-outDo not trial-divide every number. image-first, then practice
Do not trial-divide every number.

Do not trial-divide every number.

Level 25 Level 27

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