Find the missing letter in the last circle logically in the given below picture.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Whats the next number in the below number sequence pattern.

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?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Can you replace the question mark with the correct number?