 You might want to break out a calculator because it takes a genius to solve these tricky math riddles.

1. House numbers

My twin lives at the reverse of my house number. The difference between our house numbers ends in two. What are the lowest possible numbers of our house?

These math riddles aren’t easy to solve. Do you think you know the answer to this one? The lowest possible numbers for our house are 19 and 91. Also, try solving this riddle that only math geeks can figure out.

2.Egg equation

If a hen and a half lay an egg and a half in a day and a half, how many eggs will half a dozen hens lay in half a dozen days?

Two dozen. If you increase both the number of hens and the amount of time available four-fold, the number of eggs increases 16 times. 16 x 1.5 = 24. If math riddles aren’t your thing, try solving these tricky detective riddles.

3.Card question

A small number of cards has been lost from a complete pack. If I deal among four people, three cards remain. If I deal among three people, two remain and if I deal among five people, two cards remain. How many cards are there?

There are 47 cards.

4.Knight moves

I have a calculator that can display ten digits. How many different ten-digit numbers can I type using just the 0-9 keys once each, and moving from one keypress to the next using the knight’s move in chess? (In chess, the knight move in an L-shape – one square up and two across, two squares down and one across, two squares up and one across, and other like combinations)