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Math Mastermind
.The students must discover the three digit number you have in mind.
.
How to play :

Think of a three digit number (example : 615)
Ask a student to guess a three digit number. The student perhaps says 357
Write this number in the table below.

You then write 1 in the
Correct digit, wrong place because the number submitted by the student has one correct digit that is in your number (615) but it is in the wrong place.

Using this visible information, ask another student to guess another three digit number. The student guesses perhaps 485.
Write this number in the table below.

You then write 1 in the Correct digit, correct place because the number submitted by the student has one correct digit that is in your number (615) and it is in the correct place.

Using this visible information, ask another student to guess a three digit number. The student guesses perhaps 265.
Write this number in the table below.

You then write 1 in the Correct digit, correct place column and 1 in the Correct digit, wrong place column because the number submitted by the student has a correct digit (5) that is in your number (615) and it is in the correct place and also the student has guessed a second digit (6) which is in your number but is not in the correct place.

Practice with your students. Have fun!

Three digit number Correct digit, wrong place Correct digit, correct place
357 1 0
485 0 1
265 1 1
. . .

PS: Consider doing more fun printable math activities.

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