What is the next number in this series?

4,12,84,3612....

Why did Navjot Singh Sidhu put the new January calendar in the freezer

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Whats the next number in the below number sequence pattern.

Can you move 2 matchsticks to form four equal sized squares.

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Which Burger Is Different in below image?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?