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Logical Puzzles Medium 1 min

A sequence of lockers is numbered 1 to 30. Every third locker is painted blue, starting with locker 3. How many blue lockers are there?

Hint
List the multiples of 3 up to 30.

Answer

10.

Explanation

The blue lockers are 3, 6, 9, ..., 30, which contains 30/3 = 10 lockers.

Step-by-Step Solution

Blue lockers = multiples of 3.
30 ÷ 3 = 10.
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