What is always in front of you but can’t be seen?

What four weights can be used to balance from 1 to 30 pounds?

What goes up but never comes down?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

In a picnic session, a footballer was practicing. During his play, he busted lips and ears and broke ribs and thighs. However, he was still able to play a professional match on the very next day.



How can this be possible?

I know a nine-letter word having only one vowel.
Do you ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?