How to find angle...

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
Draw the analogue clock on a sheet of paper, but instead of the 12 hours, mark the 12 divisions in degrees, starting with 0 degrees at the top.

The answer should become obvious if you remember to think carefully.

Hint - the hour hand does not point to 0 degrees

Over to you....
In 60min the hour take movement of 30degree
in 60 min the min hand take movement of 360 degree
don't know more..
 

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
A clock strikes once at 1 o’clock, twice at 2 o’clock, thrice at 3 o’clock and so on. How many times will it strike in 24 hours?
 

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
A clock strikes once at 1 o’clock, twice at 2 o’clock, thrice at 3 o’clock and so on. How many times will it strike in 24 hours?
ok i got it

1+2^2+3^3+4^4+5^5...........................24^24
is there any formula for it?
 

tjohnson

Joined Dec 23, 2014
611
ok i got it

1+2^2+3^3+4^4+5^5...........................24^24
is there any formula for it?
No, you don't need to raise the numbers to any power. The answer is a sum: 1 + 2 + 3 + ...22 + 23 + 24. You can use this formula:
(n/2) * (a_1 + a_n)
to find the sum of an arithmetic series.
 
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