Question

A clock strikes onceat 1 o clck twice 2 o clock,twice 3 o clock and so on,how many times will it strikes in 24 hours​

Answer 1

Answer:

67 times stike...on 24 its strike just one time

Step-by-step explanation:

1+2+3+4+5+6+7+8+9+10+11+1

Answer 2

Answer:

a clock strikes once at 1 o' clock , twice at 2 o' clock and so on.

we have to find out number of strikes in a day .

Do you know, in a day there are 24 hours ?

But a clock made for 12 hours . Means, we have to multiply two times to sum of stikes upto 12 hours .

so, clock strikes serially , 1 , 2 , 3, 4 , ...... 12

here what you observed?

all are in AP because common difference is always 1 .

Now, use sum of n natural number = n(n+1)/2

Here, n = 12

∴ clock strikes in 12 hours = 12(12 + 1)/2 = 78

∴ clock strikes in a day = 2 × 78 = 156

Hence, answer is 156

(mark as brainlist)