Riddles and Brain Teasers

I Make You See the Beauty of Nature

I make you see the beauty of nature through colors,
My name makes things weigh less
And I have no weight at all.

What am I?

Light. Without light you wouldn’t be able to see anything. And light is made up of all the colors of the rainbow. Adding light to a word can mean it weighs less and light has no mass.

Posted in Riddles

Tagged with What am I?

Bank Wait Times

Suppose a small bank has one teller and customer transactions take 10 minutes on average. With 5.8 customers arriving per hour, what is the expected wait time? What would it be if you added a second teller?

Show the answer »

With one teller, customers will wait nearly five hours on average. But adding a second teller makes the wait go down to 3 minutes.Thanks to John D. Cook for this one.

With one teller, customers will wait nearly five hours on average. But adding a second teller makes the wait go down to 3 minutes.

Thanks to John D. Cook for this one.

Posted in Brain Teasers

Subtract One and Twelve Remains

A word I know, six letters it contains, subtract just one and twelve remains.

Show the answer »

Dozens, dozen.

Posted in Riddles

Alter By a Single Stroke

How can you alter the following equation by a single stroke to make it correct?

5 + 5 + 5 = 550

Show the answer »

5 4 5 + 5 = 550Add a diagonal line on the top left of the first plus sign to convert + into a 4. You could also put a slash through the equal sign to make ≠ (not equal) but that’s not as cool.

5 4 5 + 5 = 550

Add a diagonal line on the top left of the first plus sign to convert + into a 4. You could also put a slash through the equal sign to make ≠ (not equal) but that’s not as cool.

Posted in Brain Teasers