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Number Theory

Level 13 - realistic untimed

GCD (≤ 200)

6 visual blocks - structure tests

1

Read the shape

Level 13 visual plan for GCD (≤ 200)
Look for digit and factor structure. GCD (≤ 200).

Look for digit and factor structure. GCD (≤ 200).

2

Pick the method

Number Theory: block 2 Visual guide level shape GCD (≤ 200)Pick 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 GCD (≤ 200)First 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 GCD (≤ 200)CheckUse 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 GCD (≤ 200)Play the modeSpend the extra second on the check. image-first, then practice
Spend the extra second on the check.

Spend the extra second on the check.

6

Watch-out

Number Theory: block 6 Visual guide level shape GCD (≤ 200)Watch-outDo not trial-divide every number. image-first, then practice
Do not trial-divide every number.

Do not trial-divide every number.

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