Transcript Problem Solving: Combination Locks

What are factors?
Factors are numbers
that divide EXACTLY
into other numbers
without a remainder
Can you think of the
factors for 12?
What numbers divide exactly into
12?
1, 2, 3, 4, 6 and 12
Can you think of the
factors for 10?
What numbers divide exactly into
10?
1, 2, 5 and 10
Problem Solving:
Combination Locks
Are you ready for the challenge?
Problem Solving:
Combination Locks
• No!
• Read all the clues
• Decide which clue
is the most helpful
• Work out what all the
numbers could be
1
2
3
4
5
6
7
8
9
0
Problem Solving:
Combination Locks
I can find different answers to solve
a problem
I can check that my answers make
sense
I can explain why my answer makes
sense
Problem Solving:
Combination Locks
• The first number is a quarter of 8
•The second number is 10 take away itself
•The third number is double the first number
•The last number is the second number add 5
Problem Solving:
Combination Locks
• The last number is double the first
number
• The second number is an odd number
in the 3 times table
• The first number is ½ of 8
• The third number is a factor of 12
Problem Solving:
Combination Locks
How did you do?
Problem Solving:
Combination Locks
What do I have to do to find the combination?
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Work as a group to read the problems
Work in pair to solve the problems
Discuss your answers in your group
AGREE on a combination for the lock
Try your combination!
Problem Solving:
Combination Locks
How did you do?