It's a British sort of joke phrase such that when asked the reply or answer is:

Bean, bean, bean and a half, half a bean and a bean.

My father used to ask me this when I was young and it was told to me as,

"Two beans, a bean and a half, half a bean and a bean."

After looking at various sources trying to figure out why anyone started saying this at all, I came across many versions. They all seem to contain most of the following parts in some arrangement: two beans, a bean, bean and a half and half a bean. I decided on this version because if listen you can hear the rhythm like a poem.

"Bean, bean, bean and a half, half a bean and a bean."

Oddly about 1 in 5 of the answers didn't actually add up to 5 beans.
The father turned to his little boy and asked, "How many beans make 5?" To which his son replied with great enthusiasm,
"Bean, bean, bean and a half, half a bean and a bean!"
by S. Whiplash May 9, 2018
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British term. A shibboleth designed to establish whether a person had learned nonsense rhyme "one bean ,two bean,a bean and a half and half a bean" from his Nanny and thereby establish upper or upper middle class origins.
" That fellow isn't our sort at all ,he doesn't even know how many beans make 5"
by Thorhalland August 29, 2008
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Seedy sex game played in the bars of Pattaya, where a man guesses the age of a woman based on the view of her clitoris. Played as a best of 5.
Hey, fancy joining me at Noncerama for a game of "how many beans make 5"?
by fen riss August 18, 2011
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