We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
111
1
avatar

Four primes a, b, c and d form an increasing arithmetic sequence with a>5 and common difference 6. What is the ones digit of a?

 Dec 28, 2018
 #1
avatar+18460 
+3

41     47    53     59              ' 1 ' is in the ones digit of a

 Dec 28, 2018

10 Online Users