How many times in a given day, minutes and hour clock comes in a straight line ?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

How can you make number one disappear by adding something to it?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Solve the mathematical equation in the picture below.

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?