Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Why is a river so rich ?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

Find the missing number in the sequence 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?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

I look at you, you look at me, I raise my right, you raise your left. What am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?