Math Quiz: 10 simple addition, subtraction, multiplication and division problems that are difficult for many people
Many people think that for addition, subtraction, multiplication and division, it is easy to find the answer in a "jiffy". ]]>
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Image of dark clouds 'about to collapse' in Hanoi

The rain poured down, the streets turned into rivers, Hanoi people brought boats to the streets
Re-enactment of the Ly Dynasty's Mid-Autumn Festival at Thang Long Imperial Citadel
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