Question

A little boy has exactly 210 pieces of candy. If he buys 10 more, he will have 220. He gives away 12. How many pieces does he have now?

Answer 1

He has 210 pieces.

Comments

Not correct, how?

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"A little boy has exactly 210 pieces of candy." That means he has that right now. What he might do or what he did in the past is irrelevant.

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He gave away 12- it is relevant

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In that case the grammar is wrong.
A little boy has 210 pieces = present time
He gave away 12 = past time.
This means he had 222 pieces. He gave away 12 pieces and now he has 210 pieces.
It would be different if the question was:
A little boy has 210 pieces. He gives away 12 pieces.
That would mean he now has 198 pieces.
OR
A little boy had 210 pieces. He gave away 12 pieces. Then both are in the past and it would make sense he now has 198 pieces.

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How about now?

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Now my answer would be 198 pieces :)