From Goldbach’s conjecture to Goldbach’s law, the present proof is based on reflecting the series of the primes over any ...

To divide fractions by a whole number, we divide the numerator by the whole number and the denominator stays the same. The calculation is \( \frac{4}{5}\) ÷ 2. We know that 4 ÷ 2 = 2 so we can ...

A mental method doesn’t mean that we are expected just to write down the answer! Many of the best mental methods come with ‘jottings’ to help us remember the ‘part answers’ we need as we ...