A square number is the result of multiplying a number by itself.. This can also be called a 'number squared'. The symbol for ‘squared’ is ². For example, you would write 3 squared like this ...

So the rule is that if you want to square number X you first round it to the nearest multiple of 10, called that X + r, and then calculate X - r (i.e. round the same amount in the opposite direction).

Square number 4 is already done. Note how 4 squares are coloured in to form a square. The square has 2 rows and 2 columns. So 2 x 2 = 4! Question 1. Question 2. Question 3. Question 4.

It can calculate the square root of square numbers 1, 4, 9, 16, 25 and so on up to 900. The DNA computer uses a process known as hybridisation, which occurs when two strands of DNA attach together ...