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

Can you solve the maths in the below-given picture equation?

Rearrange the letters in "new door" to make one word.

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

I look at you, you look at me, I raise my right, you raise your left. What am I?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

There is something which is always coming but never arrives?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10