Yes, using this insight, we can find all numbers that are perfect squares because they alone have an odd number of factors. Examples include 1, 4, 9, 16, 25 and so on, where one factor repeats in the pair. Class 8 ...
Discussion Forum Latest Questions
1156 is a perfect square. Its prime factorisation is 2² × 17². All factors are in pairs. But 2800 = 2⁵ × 5² × 7, which has unpaired 2s and a 7, so 2800 is not a perfect square. Class 8 ...