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Puzzle 1 


What is the 1,000th prime number?

2, 3, 5, 7, …

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Puzzle 2 


Triathlon - Round 1Logic Puzzles

During the latest round of the BrainBashers school triathlon the final results were mislaid, however, this is what we do know.

Hayden was fourth.
Alex was not the oldest but was older than Drew, who was not second.
The child who was next in age to the youngest, finished second.
The child who finished in third place was older than the child who finished first.
Billie was younger than the child who finished in third place.
Can you determine who finished where and place the children in order of age?

Puzzle Copyright © Kevin Stone

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Puzzle 3 


Farmer Stone is quite an eccentric dairy farmer.

He originally had a total of 54 gallons of milk in three churns, and he wanted to make sure each churn contained 18 gallons of milk.

In order to do this, he did the following:

First, he poured 1/4 of the first churn into the second churn.
He then poured 1/2 of the second churn into the third churn.
Finally, he poured 1/3 of the third churn into the first churn.
How many gallons did each churn contain before Farmer Stone started pouring?

Puzzle Copyright © Kevin Stone

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Puzzle 4 


What occurs twice in a lifetime, but once in every year.

Twice in a week but never in a day?

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