You'll need to score 75% (= 9 out of 12) on the sample questions here in order to do so:
https://www.bbc.co.uk/news/uk-49485612
(Scroll down to 'Life in the UK test - a sample of questions')
If you find yourself thinking "These are bloody silly questions" though, that'll make two of us ;-)
I don't need to answer questions to prove that I'm a British citizen. I was born here, and I've lived here all my life. I'd like to see anybody challenge that!
Useful as it may be to know about Indian festivals, I wonder if that doesn’t belong in an Indian citizenship quiz. For British purposes, they should require a 500-word essay on the Dunmow Flitch.
. . . and, yes, as I wrote originally, they're bloody silly questions!
(We could have deep and serious discussions, in the style of AB's 'News' section, all night long about whom we offer British citizenship to but it seems daft to me to make the decision partly upon whether the applicants know about who wrote certain poems, etc)
It's meant to be for people on this site, Bobbisox (but it's obviously not for the people who have to pay a lot of money just to reach a point where they can be asked such ruddy daft questions!)
I don't see why knowing the answers to a load of silly questions makes one British. I went out with my Californian cousin today - he got his British citizenship last year. He had a pint of Guiness in a Covent Garden pub and then went outside for a fag - that's the way to do it!