Minute Mystery: The Daring Delivery

Bite-sized brain teaser to solve in a minute or less.

 

 

The Daring Delivery

Category: Math, Logic

A courier must deliver a package to one of three houses numbered 3, 5, and 8. The clue provided is that the correct house number is equal to the product of the other two house numbers, minus 7.

Which house should receive the package?

 

 

Solution

Let's test each possibility:
  • For house 3:
    • 5 × 8 – 7 = 40 – 7 = 33 (≠ 3)
  • For house 5:
    • 3 × 8 – 7 = 24 – 7 = 17 (≠ 5)
  • For house 8:
    • 3 × 5 – 7 = 15 – 7 = 8

 

The package should be delivered to house number 8.

 

 

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