Question

A bell in a clock rings once at 1 o'clock twice at 2 o'clock then how much it ring in a day

Answer 1

rings when 1 of clock 1 time
ring when 2 of clock 2 time
and so on
hours in a day 24
so it rings in a day = 1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9
=90 times (ANS)