What is so fragile that saying its name breaks it?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Which five letter word can be added at the end of below word to form a
valid word?

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

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

How many letters are in the alphabet?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Give it food and it will live; give it water and it will die.