961How many minutes are there in one hour?
962How many seconds are there in one minute?
963At what temperature does water freeze, measured in degrees Celsius?
964At what temperature does water boil at sea level, measured in degrees Celsius?
965At what temperature does water freeze, measured in degrees Fahrenheit?
966At what temperature does water boil at sea level, measured in degrees Fahrenheit?
967How many centimetres are there in one metre?
968How many millilitres are there in one litre?
969How many days are there in a common (non-leap) calendar year?
970A leap year, with an extra day added to February, occurs once every how many years?
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