Read closely
Identify what the question asks and notice the conditions you must follow.
Read the current challenge, look for useful clues, and test your thinking before submitting your answer below.
Identify what the question asks and notice the conditions you must follow.
Try a sketch, list, table, or example. Check whether it fits every clue.
Use the challenge form below when you are ready. Follow the instructions shown with the current challenge.
The Halloween Bash supply box has a three-digit lock code.
None of the digits is zero.
The three digits add up to nineteen.
The tens digit is twice the ones digit.
The hundreds digit is one less than the tens digit.
What is the code?
Think it through: Organize the clues with a sketch, table, or number sentence. Check that your answer satisfies every clue.
Use the Brain Challenge to use clues and logical reasoning to test a possible answer. Read the current directions on this page before you begin, because the activity or available choices may change.
Read the current challenge and every condition. Decide what the question asks before trying to solve it.
Use a sketch, list, table, or small example to test your idea. If a clue contradicts your arrangement, revise it rather than ignoring the clue.
Check your answer against all the information. Follow the entry instructions and check whether the current challenge is open before trying to submit.
The Brain Challenge is a chance to practice careful thinking. You can learn from testing a strategy even when your first idea does not work.
Find more support through the Student Hub or open the Student Toolkit.