Which is faster, Heat or Cold ? Explain.

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

Count the squares in the matchstick puzzle below?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Can you count the number of squares in the figure below?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?