Why is 6 afraid of 7?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Find the next number in the series

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

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

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

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

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

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?