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

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Which is heavier: a ton of bricks or a ton of feathers?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?