I thought I had finally understood when to use à with réussir, but I'm now more confused than ever. Decades ago, when I studied French in high school, we were taught to say, "Il a réussi à son examen." Then, a few years ago, I was told that réussir takes a direct object: "Il a réussi son examen; il l'a réussi." However, when I go online, I find more examples with à than without! I googled "a réussi à l'examen" and got 1700+ hits; but "a réussi l'examen" got only 700+ hits. Can someone please tell me when to use réussir + à ? Merci bien.