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

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

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

Find out the missing number in the picture attached:

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

why number 8549176320 is one of a kind?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.