### Theory

 1 Introduction to square and square numbers 2 The properties of square numbers 3 Steps to find out the perfect square 4 Interesting patterns in square numbers 5 Pythagorean triplets 6 Steps to find the square of decimal numbers 7 Square of a number using diagonal method

### Exercises

 1 Calculate the square of a number Difficulty: easy 3 2 Choose the correct perfect square Difficulty: easy 3 3 Which of the following numbers end with digit 1 Difficulty: easy 3 4 Find the square of given decimal numbers Difficulty: easy 3 5 Find two consecutive natural numbers Difficulty: medium 4 6 Find out which of the following digits end with 6 Difficulty: medium 4 7 Examine if the given number is a perfect square Difficulty: medium 4 8 Calculate the square of given decimal numbers Difficulty: medium 4 9 Answer the following questions Difficulty: medium 4 10 Numbers end with digit 9 Difficulty: medium 4 11 Find the square of a given number Difficulty: medium 4 12 Find the Pythagorean triplets Difficulty: hard 5 13 Find out the smallest number that should be multiplied with given number Difficulty: hard 5 14 Find the sum of the odd numbers Difficulty: hard 5

### Tests

 1 Training test Difficulty: medium 10 2 Training test Difficulty: medium 10

### Teacher manual

 1 Methodical recommendation