Previous DNA computer models have been able to calculate square roots with up to 4-bit binary numbers, says the team, led by researcher Chunlei Guo, in the paper's abstract.

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 ...

This required 4-bit binary numbers – the new prototype implements a 10-bit square root logic circuit, operating up to the decimal integer 900.

Some essential square roots are better memorised When tackling square roots of complex numbers in an exam, knowing some key square roots in advance can save both time and effort.