How many seconds are there in an hour?, How many minutes are there in a day?, How many hours are there in a week?, How many days are there in a period of four years?, We have a leap year every ______years., A leap year has got_____days., We need leap years because the Earth doesn't take_____ days to go round the Sun. It takes_____days., It takes______ days for the Moon to go round the Earth., A lunar year has got____days., How long does it take you in seconds to tie your shoelaces?, How long in minutes does it normally take you to eat your breakfast?, How many hours do you normally sleep at night?, How many weeks are there until your next birthday?, How many years are there until you leave school?, How many days do you have for school holidays in a year?

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