Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

What does this rebus means ?

PROG WORKRESS

Find the hidden panda in the image below.

What number divided by 4 is the same as that number minus 4?

What is the difference between a jeweller and a jailer?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?