By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

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

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

Find the smallest sentence with all the English alphabet.

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.