A Fast Grower

There is a creature which could double its size every **day**. So, if the creature is put in a tank then it will fill the tank in 10 **days**.
How many **days** would it take for the creature to fill a half and how many **days** to fill a quarter of the tank?

Shave Every **Day**

What Flies **When** it's Born...

Throw Out **When** Use

Smells Bad **When** Living...

Flies **When** Born, Runs **When** Dead

Tall **When** Young

The 15 Minutes Recipe

A recipe requires 15 minutes to **cook**. You have a 7 minutes hourglass and an 11 minutes hourglass with you. How will you measure 15 minutes using them?

I turn around once,
what is out will not get in.
I turn around again,
what is in will not get out.
What Am I?

What do you bury **when** itâ€™s alive?

The Tenth Floor

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, **when** he comes back, on a rainy **day**, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment. Why?

21 Going on 24

The **day** before yesterday I was 21, and next year I will be 24. **When** is my birthday?

Drowned But Not Wet

The Meeting of Planes

There are two planes. One is going from Los Angeles to Japan at a speed of 600 MPH. The other is traveling from Japan to Los Angeles at a speed of 500 MPH.
**When** the planes meet which one will be closer to Japan?

Falls But Never Breaks

The Short Cut and the Train

Walking home one **day**, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well. If you can run ten miles per hour, how fast is the train moving?

Doctor and Bus Driver

A doctor and a bus driver are in love with the same woman, Sarah. The bus driver had to go on a long trip that would take a week. Before he left, he gave Sarah 7 apples. Why did he do that?

My Wall Clock

I have a clock in my house, on the wall.
On a summer's **day** I forgot to wind it and it stopped. Then I went to visit a friend who had a watch that was always right on time. After I stayed for a bit, I went home, made a simple alteration and set the clock just right.
Now how did I do this **when** I had no watch on me to tell how long it took me to come back from my friend's place?

Dead and Alive

Two girls, same parents...

Two girls have the same parents and were born at the same hour of the same **day** of the same month, but they are not twins. How can this be possible?

Google Riddles - A Helium Balloon in the Car

You're sitting in a car. The car has helium balloons tied to its floor. The windows in the car are closed and locked and the Air conditioner isn't working.
What will happen to the balloons **when** you press on the gas?
Will they move forward, stay in place, move backwards...?

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