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

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?

How many times can you subtract the number 5 from 25?

What is so fragile that saying its name breaks it?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

What demands an answer, but asks no questions

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?