45 = 5 \times 9\) and so is not prime. 43 is prime as the only factors of 43 are 1 and 43. The first square number is 1 because \(1 \times 1 = 1\). The second square number is 4 because \(2 \times ...

You must have learnt about prime numbers in Class 4 or 5. Want to recall it? So, prime numbers are those numbers which are only divisible by 1 and themselves. They do not have any other factors ...

We look at how to decide whether a natural number is prime or composite by looking for proper factors.The importance of being methodical is emphasised. Ends with a square roots sketch illustrating ...

Prime numbers are intriguing numbers that are greater than 1 and can be evenly divided only by themselves and 1. The four smallest prime numbers are 2, 3, 5 and 7. Next comes 11, which is quite a ...