Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I can write cow in 13 letters.

Can You?

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

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?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What has one eye, but can’t see?

What is the difference between a jeweller and a jailer?

Can you find the 09 errors in the picture below?

By using 'because' continuously three times, can you make an English statement ?