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

Solve the alphametic puzzle by replacing the alphabet with the number.

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Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

People put me on the table and cut me but do not eat me. What am I?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?