SOLUTION: If a is the smallest prime number greater than 21 and b is the largest prime number less than 16, then ab = A 299 B 323 C 330 D 345 E 351 How do you work this problem? Ca

Algebra ->  Divisibility and Prime Numbers  -> Lessons -> SOLUTION: If a is the smallest prime number greater than 21 and b is the largest prime number less than 16, then ab = A 299 B 323 C 330 D 345 E 351 How do you work this problem? Ca      Log On


   



Question 471261: If a is the smallest prime number greater than 21 and b is the
largest prime number less than 16, then ab =
A 299
B 323
C 330
D 345
E 351
How do you work this problem?
Can you please tell me how to work the problem and not just give me the answer?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
Note: Prime Numbers from 0 to 100
2, 3, 5, 7, 11, highlight%2813%29, 17, 19, highlight%2823%29, 29, 31, 37, 41, 43, 47, 53, 59,
61, 67, 71, 73, 79, 83, 89, 97
a is smallest prime number greater than 21 and b is the
largest prime number less than 16, then ab
a * b = 23*13 = 299