Question:Four prime numbers are in ascending order of their magnitudes. The product of the first three is 385 and that of last three is 1001. The largest given prime number is : 

A 11 
B 13 
C 17 
D 19 

+ Answer
B 

+ Explanation
we note that `5 xx 7 xx 11 = 385`

The prime number next to 11 is 13.

Also `7 xx 11 xx 13 = 1001.`

Hence, the required number is 13

+ Report

Irin Moni

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