A buzzel to solve

I have many keys but no locks. I have space but no rooms. You can enter but not go outside. What am I

I spin once every 24 hours, but different places see sunrise at different times. What am I?

Two identical ice cubes are placed on a wooden table. One is sprinkled with salt, the other left plain. Which melts faster and why?

I start with “e” and end with “e” but usually contain only one letter. What am I?

You are in a room with three switches and a closed door. The switches control three light bulbs in the next room. You may flip the switches any way you like but can open the door only once. How can you figure out which switch controls which

Sound travels fastest through which: air, water, or steel?

A moving car has two main forms of energy. Name them.

What 5-letter word becomes shorter when you add two letters to it?

A burning candle is covered with a glass jar. After a short time the flame goes out. What gas is being used up?

Why is the sky blue during the day but red/orange at sunrise and sunset?

A paperclip made of steel sinks in water. But you can make it “float” without glue or tape. What property lets this happen?

A farmer has a wolf, a goat, and a cabbage. He can take only one of them at a time across a river. If the wolf is left with the goat, the wolf eats the goat. If the goat is left with the cabbage, the goat eats the cabbage. How can the farme

What metal is strongly attracted to a magnet but is not itself magnetic unless treated?

I’m a square number between 30 and 60. My digits add to 9. What am I?

At noon you measure your shadow: it’s shorter than you. Later in the afternoon it’s much longer. What changed—the Sun’s brightness, the Sun’s distance, or something else?

A clock loses 10 minutes every hour. It is set correctly at midnight. When the clock shows 6:00 a.m., what is the actual time?

Name a number between 10 and 100 that looks the same upside down on a calculator display.

Multiply me by 3 and add 12, you get 39. What’s my number?

I’m a two-digit number. My digits add to 11, and if you reverse them you get a number 27 bigger than the original. What number am I?