Which is faster, Heat or Cold ? Explain.

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Take away the whole and some still remain. What is it?

What is the riddle which can be asked all day with a different correct answer each time.

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

By what process could you make a 'Tea-Table' into food?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Solve the mathematical equation in the picture below.

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?