Spot 5 differences in two Christmas tree below:

What demands an answer, but asks no questions

When 99 is considered higher than 100?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

Which wheel of car does not rotate when you turn your car right?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

How many letters are in the alphabet?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?