A man dies of old age on his 25 birthday. How is this possible?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Can you find out the missing number in the grid?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Why Wine Glass Stem is so long?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?