Can anyone tell me a word in the English dictionary which has a silent 'z'?

By using 'because' continuously three times, can you make an English statement ?

If 1+9+8=1, what is 2+8+9?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

What do you get if you add 2 to 100 four times?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

Find the next number in the series below

21 32 54 87 131 ?

What is at the end of a rainbow?