What is next number in the pattern below:

131 517 192 123 ?

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?

Can you spot the man between the coffee bean in the picture below ?

What is the fastest way to double your money?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

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