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

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

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

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

What is next number in the pattern below:

131 517 192 123 ?

Why is the Hole below a Lock?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

What is always in front of you but can’t be seen?