Number theory/product trick: Multiply all the numbers on a telephone dial and identify the correct value. Telephone dial digits considered: 0 through 9. Find the product 0 × 1 × 2 × … × 9. Choose the correct value.

Q: Number theory/product trick: Multiply all the numbers on a telephone dial and identify the correct value. Telephone dial digits considered: 0 through 9. Find the product 0 × 1 × 2 × … × 9. Choose the correct value.

Observation The dial includes the digit 0. Calculation 0 × 1 × 2 × … × 9 = 0. Note Since 0 is not listed among the numeric choices, the appropriate option would be "None of these".

Difficulty: Easy

1,58,480
1,59,450
1,59,480
None of these

Correct Answer: 0

Explanation:

Observation
The dial includes the digit 0.

Calculation
0 × 1 × 2 × … × 9 = 0.

Note
Since 0 is not listed among the numeric choices, the appropriate option would be "None of these".

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