which number is prime?
which number is prime?
I got this question when I was doing my SOF Olympiad Practice.The Solution say's the answer is (B).But I don't understand how.....
Each of the first ten prime numbers is written on an individual piece of paper and put into a hat. If two are drawn at once, so that means without replacement, what is the probability that the sum...
It is given that p is a prime number and p > 5. a) Show that p= 6n + 1 or p = 6n + 5 for some positive integer n. b) Hence, show that p2 + 2 is divisible by 3. How...
The sum of 2 postive prime numbers is a prime number and 3 times that sum is an odd number. Which of the following prime numbers must be one of the original prime numbers?? A)2 B)3 C)5 D)7 E)11 I...
hint- begin by taking its square root
-Which of the following is not a prime number? A. 11 B. 19 C. 5 D. 24
For k≥2 let C(k) donate the number of different k-cycles of σ with fundamental period k. Show that if k is a prime number, then C(k)= (2k-2)/k
138,215,030 is a product of 3 prime numbers. Which ones? How am I supposed to calculate this?
It's about Prime numbers
question 2: Try to find a positive integer n such that n^2-n+41 is not a prime.
I have no idea how to start. sorry
nothing lease