Which wheel of car does not rotate when you turn your car right?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What does the below image rebus riddle means ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

What has a ring but no finger?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

Replace the question mark with the correct number in the below-given picture?