Substituting the day and time information which is acquired in step (S103) and the specified day and time functional expression which acquire the day and time information at the time of making questions required acceptance of study problem from the clock device which possesses step (S101) and accept the making questions demand for study problem step (S102) and the day and time information which register the making questions statement which uses specified day and time functional expression, at each time it is making questions request step (S104) and with the step (S105) which creates study problem outputs the study problem which was created, study problem of the contents which each time differ is created automatically. In addition, study problem of the contents which each time differ in the same way by using random number is created automatically.
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