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Identify the mystery number. Explain your process for figuring it out.

Identify the mystery number. Explain your process for figuring it out.-example-1
User Joyleen
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We know that the value x we are looking for is even, and is greater than 6 and less than 10.

We start with the condition of being even.

Then x can be 2, 4, 6, 8, 10, 12, 14...

If we know that is greater than 6, we can eliminate 2, 4 and 6 from the list.

x can be: 8, 10, 12, 14...

If we know that x is less than 10, we can eliminate 10 and all the values above 10.

Then, x is 8, as it is the only value left in the list of possible values.

Answer: the number is 8.

User Sherrise
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