How many triangles can you find in this given picture?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What Deficiency does the below rebus represent?

VIT_MIN

What happened when the wheel was invented?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?