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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

What always comes into a house through the keyhole?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Can you decipher the following common phrase?

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

If 21x = 79x, what is the value of x?

Find the next number in the following series:
6, 14, 26, 98, __?