Clock and calender

Clock and calender

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  1. How many times are the hands of a clock is at right angle in a day?








  1. View Hint View Answer Discuss in Forum

    In 12 h, they are at a right angles, 22 times.
    So, in 24 h, they are at right angles, 44 times.

    Correct Option: C

    In 12 h, they are at a right angles, 22 times.
    So, in 24 h, they are at right angles, 44 times.

  1. A clock buzzes 1 time at 1 O'clock, 2 time at 2 O'clock, 3 times at 3 O'clock and so on. What will be the total number of buzzes in a day?








  1. View Hint View Answer Discuss in Forum

    Number of buzzes in a day
    (1+2+3+4+5+6+7+8+9+10+11+12)x2

    Correct Option: B

    Number of buzzes in a day
           = 12(12 + 1)/2 x 2 = 156