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

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Can you replace the question mark with the correct number in the below table sequence?

What is the last thing you take off before bed?

What Adam and Eve do not have but the rest of the people have?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

Find out the number of circles in the given picture having Illusion

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Why is the Hole below a Lock?