What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What does this say?

XLR8

Find the next number in the sequence

5 12 24 36 ?

In the image given, you can find several triangles. Can you count them all?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

What has a bottom at the top?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?