Copying Cassette Tapes

Joe and Andrea want to copy three 60-minute cassette tapes. They have a 2-cassette recorder to copy the tapes, allowing them to copy two tapes at a time. Each side takes 30 minutes to be copied, so two tapes can be copied in an hour and the third will take another hour. Andrea bets Joe she can copy all three tapes in 90 minutes. Does she win the bet?

In the first 30 minutes Andrea copies the A sides of tape 1 and 2.
In the second 30 minutes, she copies tape 1 side B and tape 3 side A (finishing Tape 1).
In the last 30 minutes, she copies tape 2 side B and tape 3 side B.

Posted in Brain Teasers

A Group of Three

I give you a group of three. One is sitting down, and will never get up. The second eats as much as is given to him, yet is always hungry. The third goes away and never returns.

Stove, fire, smoke.

Posted in Riddles

The More You Have, The Less You See

The more you have of it, the less you see. What is it?

Darkness.

Posted in Riddles

I Hide In A Dark Tunnel

I hide in a dark tunnel awaiting my time.
I can only be released by pulling back.
Once released, I may do unspeakable damage.

A bullet.

Posted in Riddles
Tagged with

You Twirl My Body

You twirl my body but I keep my head up high.
When I go in I keep things tight.

What am I?

A screw.

Posted in Riddles
Tagged with

Coffee

What does this represent?

COF FEE

Coffee break. The word coffee is broken into two pieces.

Posted in Brain Teasers
Tagged with

Abraham Encoding

The name ABRAHAM can be changed into a word for a primitive musical instrument by replacing each letter with a different letter. The repeated letters (A is this case) must be replaced with the same replacement letter in the new word.

What is the musical instrument?

PANPIPE

Posted in Brain Teasers

Kevlar, Fire Escapes and Wipers, Oh My!

What do computer compilers, kevlar, fire escapes and windshield wipers all have in common?

They were all invented by women.

A variation of this brain teaser includes laser printers (they were invented by Gary Starkweather) and bulletproof vests (invented by Casimir Zeglen using silk, though modern vests use Kevlar, so it’s halfway right).

Posted in Brain Teasers

Ted, Tate and Erica

What do the following names, in this particular order, have in common?

Ted
Tate
Erica

They are found in this order in The United States of America.

Posted in Brain Teasers

What Boys Use, Girls Like and Parents Hate

Boys use it, girls like it, parents hate it. What is this 5-letter word?

The phone.

Posted in Riddles