If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Next Number in the Series,

5, 16, 49, 104, ?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

What does an Island and the letter T have in common?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Solve the equation in the image by looking at the pattern closely.

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

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?