Related Questions

The number of two digit prime numbers which remain prime even inverting the position of its digits is:
The smallest prime number, that is the fifth term of an increasing arithmetic sequence in which all the four preceding terms are also prime, is -
The product P of two prime numbers is between 9 and 55. If one of the prime numbers is greater than 2 but less than 6 and the other is greater than 13 but less than 25, then P =
Rahim has invited his three buddies over to watch the basketball game on his wide-screen television. They are all hungry, but no one wants to leave to get food. Just as they are arguing about who should make the food run, a commercial comes on for a local pizzeria that delivers. The phone number flashes on the screen briefly and they all try to remember it. By the time Zachary grabs a pen and paper, each of them recollects a different number.i. All of the men agree that the first three numbers are 995.ii. Three of them agree that the fourth number is 9.iii. Three agree that the fifth number is 2.iv. Three agree that the sixth number is 6; three others agree that the seventh number is also 6.Which of the numbers is most likely the telephone number of the pizzeria?
A number is selected at random from 40 to 59 inclusive . What is the probability that the number is prime number ?
Which number is not a prime number?
Find the number which is NOT a prime number.
Which one of the following is not a prime number?
Find the probability of selecting a prime number from a set of number 1 to 15 (both inclusive).
All of the following numbers may be written as the sum of two prime numbers except one. which one may not be so written?