John is the son of Jacob.
So,
Jacob is the_____of John's father?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

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?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

With the help clues provided in the image, can you find the 5 digit key?

What jumps when it walks and sits when it stands?

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?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Why Wine Glass Stem is so long?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?