In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

10+10 and 11+11 can give you the same answer.

Explain how?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

How many triangles are there on the puzzle below?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?