Problem 45

SELECT k
  FROM (SELECT n * (n + 1) / 2 k
          FROM (SELECT     LEVEL + 285 n
                      FROM DUAL
                CONNECT BY LEVEL < 100000))
 WHERE k > 40755
INTERSECT
SELECT k
  FROM (SELECT n * (3 * n - 1) / 2 k
          FROM (SELECT     LEVEL + 165 n
                      FROM DUAL
                CONNECT BY LEVEL < 100000))
 WHERE k > 40755
INTERSECT
SELECT k
  FROM (SELECT n * (2 * n - 1) k
          FROM (SELECT     LEVEL + 143 n
                      FROM DUAL
                CONNECT BY LEVEL < 100000))
 WHERE k > 40755

Project Euler: Level up

Bravo, xxxxxxx! Now that you have solved 25 problems you have achieved what 77.71% of members have failed to do and have advanced to level 1. Good luck as you continue.