# Math Help - Multile choice question #2

1. ## Multile choice question #2

Q29: There are four prime no written in ascending order. The product of the
first three is 385 and that of the last three is 1001.The last no is?
A. 11
B. 13
C. 17
D. 19
how?

2. This one you would just use trial and error.

Write down the prime numbers up to $\displaystyle 19$ and work out the products of the four consecutive primes ending in $\displaystyle 11,13,17,19$.

3. Why do you assume consecutive primes?

4. Originally Posted by HallsofIvy
Why do you assume consecutive primes?
Because I stupidly read "ascending order" as "consecutive"...

5. I think that in this question you can just write down the prime factorizations of the 2 given numbers, and the answer will magically appear.