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Number Intruder Investigation

Froggy Jumps

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About this activity

Math challenge: find the intruder

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Lebanon

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Number Intruder Investigation
 

Froggy Jumps

Number Intruder InvestigationOnline version

Math challenge: find the intruder

by Hidden Author
1

CASE 1: Three cards are factors of 10. Cards: 1, 2, 5, 6. Which is the intruder?

2

CASE 2: Three cards are factors of 12. Cards: 2, 3, 6, 5. Which is the intruder?

3

CASE 3: Three cards are factors of 18. Cards: 2, 3, 9, 8. Which is the intruder?

4

CASE 4: Three cards are common factors of 12 and 18. Cards: 1, 3, 6, 4. Which is the intruder?

5

CASE 5: Three numbers are multiples of 3. Cards: 6, 9, 12, 14. Which is the intruder?

6

CASE 6: Three numbers are multiples of 4. Cards: 8, 12, 20, 18. Which is the intruder?

7

CASE 7: Three numbers are prime numbers. Cards: 2, 3, 5, 9. Which is the intruder?

8

CASE 8: Three statements are true about prime numbers. Cards: '2 is prime','3 is prime','1 is prime','5 is prime'. Which is the intruder?

9

CASE 9: Three numbers are factors of 12 but only TWO are prime factors. Cards: 2, 3, 4, 6. Which card is NOT a prime factor and is also composite?

10

CASE 10: What is the H.C.F. of 12 and 18?

11

CASE 11: Which set contains the common factors of 12 and 18?

12

CASE 12 FINAL INVESTIGATION: Which set contains the prime factors of 12?

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