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Mystery Numbers

This document contains 4 mystery number puzzles of increasing difficulty. Mystery Number 1 is a 2-digit number where the tens digit is a multiple of the ones digit and their sum is 9. Mystery Number 2 is a 3-digit odd number where all digits are the same and their product is 27. Mystery Number 3 is a 4-digit number where the thousands digit is twice the ones digit, the hundreds digit is one less than the thousands digit, and the sum of the digits is 25. Mystery Number 4 involves a 4-digit number where the thousands digit is even and a multiple of 3, the ones digit is 1 less than the tens digit, the hundreds digit is 3 more than the thousands digit, and the tens digit equals

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857 views3 pages

Mystery Numbers

This document contains 4 mystery number puzzles of increasing difficulty. Mystery Number 1 is a 2-digit number where the tens digit is a multiple of the ones digit and their sum is 9. Mystery Number 2 is a 3-digit odd number where all digits are the same and their product is 27. Mystery Number 3 is a 4-digit number where the thousands digit is twice the ones digit, the hundreds digit is one less than the thousands digit, and the sum of the digits is 25. Mystery Number 4 involves a 4-digit number where the thousands digit is even and a multiple of 3, the ones digit is 1 less than the tens digit, the hundreds digit is 3 more than the thousands digit, and the tens digit equals

Uploaded by

flojoharini
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Mystery Numbers

Mystery Number 1: Here are your clues!! I call this a Level 1.


First clue – I am a two-digit number.
Second clue – My tens digit is a multiple of my ones digit.
Third clue – The sum of my digits is nine.
And the number is?_______

Mystery Number 2: Here are your clues. This one’s a Level 2 (a little
harder.)
First clue – I am a three-digit number.
Second clue – I am an odd number.
Third clue - All my digits are the same.
Fourth clue – The product of my digits is 27.
And the number is?_______

Mystery Number 3: I call this one a Level 3!


First clue – I am a four-digit number.
Second clue – My ones digit is a four.
Third clue – My thousands digit is twice the value of the ones digit.
Fourth clue – My hundreds digit is one less than the thousands digit.
Fifth clue – The sum my digits is 25.
And the number is?____________

Mystery Number 4: Let’s do another Level 3 problem.


First clue – I am a _______digit number.
Right!! You’re catching on. A Level 3 problem involves a four-digit
number.
Second clue – My thousands digit is even and is a multiple of 3.
Third clue – My ones digit is an even number and 1 less than my tens
digit.
Fourth clue – My hundreds digit is three more than my thousand’s digit.
Fifth clue – My tens digit is is equal to my hundreds digit.
And the number is?______________

KEY: Mystery Number 1 = 63; 2 = 333; 3 = 8764; 4 = 6998


Mystery Number Checklist
Name:

Each mystery number you create is worth 40 points. Use the following
checklist when preparing your clues. Remember to create three mystery
numbers, each one at a different level.

Mystery Number One


1. _____Level One (2 digit)
2. _____Mathematical vocabulary used (odd, even, multiple, sum,
product, difference, equal, digit, ones, tens).
3. _____At least one operation is used.
4. _____Clues given for each digit.
5. _____Clues lead to the correct solution of the mystery number.

Mystery Number Two


1. _____Level Two (3 digit)
2. _____Mathematical vocabulary used (including place value
vocabulary for each digit – ones, tens, hundreds).
3. _____At least two operations are used.
4. _____Clues give for at least two of the digits.
5. _____Clues lead to the correct solution of the mystery number.

Mystery Number Three


1. _____Level Three (4 digit)
2. _____Mathematical vocabulary used.
3. _____At least three operations are used.
4. _____Clues given for at least 3 of the digits.
5. _____Clues lead to the correct solution of the mystery number.

Each item is worth 8 points. Write the clues for your Mystery Number on the
front of the card. On the back of the card, illustrate the Mystery Number with
a model or write the number in words or in expanded notation to show the
number’s value.

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