In the four images below, can you find the odd one out?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

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

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

How is a fly different from a mosquito?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

What has a ring but no finger?

Find the number of squares in the below picture

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?