Grade 1 olympiad math clocks and calendar practice worksheets for kids Clocks and Calendar Worksheet-3. (1) Which activity will take less than 1 minute to finish? A. eating lunch B. fixing chair. C. writing your name D. planting a tree. (2) The clock is showing the current time. What was the time 1 hour before? A. 3 O'Clock B. 9 O'Clock C. 6 O'Clock D. 7 O'Clock. (3) Payal woke-up at 7 o'clock.