Adding larger numbers in your head is not always easy. If you need to use pen and paper, then the column method is a good way to add. It involves writing one number beneath the other, so that the ...

One such interesting question is: "I am a 4 digit number between 5000 and 6000. My ones place is half of my tens place. My hundreds place is 3 times my tens place. What number am I?" (Image credit: ...