What is the next number in this series?

4,12,84,3612....

What do you call a fish without an eye?

Which digit occurred maximum times between the number 1 and 1000?

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 = ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?