I travel all around the world but always stay in the corner. What am I?

What goes up but never comes down?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Find the next number in the sequence

5 12 24 36 ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?