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Four Digit Products

Directions: Using the digits 1-9, at most one time each, fill in the blanks to make a true multiplication equation.

Hint

Hint

What would not work as a digit in the tens place?

Answer

Answer

Number of Unique Solutions: 12

1: 23 * 69 = 1587

2: 32 * 49 = 1568

3: 34 * 52 = 1768

4: 34 * 58 = 1972

5: 38 * 52 = 1976

6: 42 * 38 = 1596

7: 53 * 92 = 4876

8: 56 * 39 = 2184

9: 57 * 24 = 1368

10: 58 * 37 = 2146

11: 58 * 64 = 3712

12: 62 * 87 = 5394

Source: Adina R

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7 comments

  1. 23*74 would be correct only if you didn’t have to put in the answer to the equation

  2. 23*74 is what I think the answer is

  3. mom of 4th grader

    what is the math trick or strategy behind this problem and solution? how do you get to a correct answer, aside from trial and error??

  4. Ummm the given answer, 23* 74 is not correct.

  5. 90X99=8910

  6. 90 * 74 = 6660

  7. Good question! How DOES one deduce the correct answer without plugin & chugging their way through a list of numbers as long as the day?

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