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

Can you find out the total number of triangles in the given figure?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

Spot 5 differences in two Christmas tree below:

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

Prove that the below maths equation is true.

8 + 8 = 91

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?