Answer - Riddles for Kids and their Curious Parents No.5
That was a real something, right? If you’re here, we hope that it means that you have the answer to our 100 Lockers riddle (or just curious to find out the answer to that tricky one).
Solving the Riddle
Only the lockers that have a perfect square number will be open when you are finished, which means lockers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100 will be open.
Let’s walk through the explanation
This riddle involves finding a pattern in order to determine which lockers will be open. You can see that only lockers that have an odd number of factors (including 1 and the number itself) will be open at the end, which are perfect squares. Therefore, only lockers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100 will be open.
Example 1:
We opened all 100 Lockers. Let’s look at Locker number 4. He’ll get closed at “every 2” and get open again at “every 4”. Then, from “every 5,6,7” it remains open.
Example 2:
We opened all 100 Lockers. Let’s look at Locker number 10. He’ll get closed at “every 2”, open at “every 5” and close again at “every 10”. Then, from “every 11,12,13” it remains closed.
That wasn’t an easy one, ha? Now you can’t wait to try another one, right?.
What’s Next?
Want another spin? We’ve made a great list of 5 Best Riddles for Kids. We can also recommend the One Flashlight for All riddle or Balance the Scale riddle to keep it rolling.
