My 5 year old asks how many children Queen Victoria had. From memory I thought 13 (way off I know, but I had 6+7 not 4+5). Anyway, I explained that when I was his age I needed to use a book as we didn't have the internet (let alone Encyclopedia on a CD-ROM, roll on 1992).
So we used Wikipedia, and to make it harder we went to Wikipedia , then searched and manually counted.
I later recounted the story to my wife, and commented that I could have just said "ok Google, how many children did queen victoria have" but I don't want him so reliant.
I did try it anyway and Google says 10! Not 9, 10.
And because of the way it presents the answer there is no reference to follow to try and understand the error. If you ask "who were the children of Queen Victoria" it still says 10 but only gives you 9 images.
So, moral of the story, don't trust Google just yet.