I like it most or the most?

I was sure that both versions are correct:
1. I like it most
or full version:
I like it most of all
2. I like it the most

But a teacher has corrected 'I like it the most' crossing out 'the'. Was he right?

"I like it the most" is commonly used in colloquial BrE.

Quote:

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Originally Posted by Grumpy

"I like it the most" is commonly used in colloquial BrE.

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So I can use it in an informal letter to a friend.
'The last point of the evening was the presentation about food which people liked the most"
Is there any possible explanation for marking 'the' as a mistake?

Quote:

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Originally Posted by angelene001

So I can use it in an informal letter to a friend.
'The last point of the evening was the presentation about food which people liked the most"
Is there any possible explanation for marking 'the' as a mistake?

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Your sentence is fine with "the most".