Are girls not as interested in math?

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CHIANG MAI, THAILAND - James Brown may think it's a man's world, but let's not forget, he also said, it wouldn't be anything without a woman or a girl.

After all, women in the U.S. have made it clear that they add value in their own way.

How does that stack up when it comes to a different competition, like math? The question comes after six American boys were crowned this year's top mathletes after winning the International Mathematical Olympiad in Thailand.

A lot of people are wondering why there were no girls part of the winning equation. It's been more than twenty years since an American team has won the competition, and one math coach says for many of those years, the participation of girls seems to be decreasing.