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

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

How could a baby fall out of a twenty-story building onto the ground and live?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

What number comes next in this sequence:
7 8 5 5 3 4 4 _

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

I cannot talk, but I always reply when spoken to. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?