60 x31 x 29 = 53940 You can do this one in your head if you look at it for a moment ! 31 x 29 can be re-written (30+1)(30-1) which is the same as 302 - 1. Multiplying this by 60 gives (2 x 303) - 60, or 54000 - 60 which is 53940.

Yes, 29 and 31 are twin primes. Explanation: A pair of primes that differ by 2 are called twin primes. 29 and 31 both are primes and their difference is 31-29 = 2. So, the given pair of primes is twin primes.

The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29 The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29 The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29 The arithmetic mean is (22 + 31 + 34)/3 = 87/3 = 29

I'll assume you mean the first 30 positive integers, and not real numbers. That would be 31 X 15, or 465. 30 + 1 = 31, 29 + 2 = 31, 28 + 3 = 31, etc. This can happen 15 times, with 15 + 16 = 31 being the fifteenth.

31 times 1 = 31 As 31 is a prime number, the only whole numbers that do it are 1 × 31. There is another method using fractions. Ex: 15.5 x 2=31 Only 1 times 31 = 31 . This is because 31 is a Prime number.