It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

81 x 9 = 801. What must you do to make the this equation true?

Can you divide the below-given shape into four equal and identical pieces?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

How many times do a clock's hands overlap in a day ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I am white when I am dirty, and black when I am clean. What am I?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?