Determine the unit's digit in the product of consecutive numbers from 86 to 94?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 0
The units digit of a product depends only on the units digits of the numbers multiplied, and once a factor ending in 0 enters the product, the product ends in 0.
The numbers from 86 to 94 include 90, which ends in 0
Any whole number multiplied by 90 ends in 0, so the units digit of \(86\times87\times\cdots\times94\) is 0