There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

What four weights can be used to balance from 1 to 30 pounds?

When it's bad luck to meet a black cat?

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?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A Miser man decided to go on a vacation for a month. He goes to the bank and asks for a trip loan of $500. The bank officer asks the man that the loan can only be approved when he mortgage some valuable thing at the bank. Miser man mortgages his only car whose worth was a whopping $80000. The Bank officer laughed at him and approve the loan instantly. After vacation when the miser man returns, the bank officer asked him "Are you an idiot, why is your mortgage such an expensive car for such a short loan?".

Miser man replied with some reason and the bank officer agreed that the miser man is actually not an idiot.

What did miser man reply to the bank loan officer?.

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

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

I taste better than I can smell. Who am I?

Count the number of lines in the image below ?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?