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

Look at the picture and find out which square is not linked with any of the other squares.

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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

What number when divided in half becomes zero?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

Count the squares in the matchstick puzzle below?

I’m orange, I wear a green hat and I sound like a parrot. What am I?