Question

# Which operation could we perform in order to find the number of milliseconds in a year? 60 * 60 * 24 * 7 * 365 1000 * 60 * 60 * 24 * 365 24 * 60 * 100 * 7 * 52 1000 * 60 * 24 * 7 * 52?

Complex numbers
Which operation could we perform in order to find the number of milliseconds in a year?
$$\displaystyle{60}\cdot{60}\cdot{24}\cdot{7}\cdot{365}$$
$$\displaystyle{1000}\cdot{60}\cdot{60}\cdot{24}\cdot{365}$$
$$\displaystyle{24}\cdot{60}\cdot{100}\cdot{7}\cdot{52}$$
$$\displaystyle{1000}\cdot{60}\cdot{24}\cdot{7}\cdot{52}?$$

2020-12-26
We need to determine the number of milliseconds in a year.
First of all, "milli” means thousandth and thus one second contains 1000 milliseconds.
1s=1000 ms
Next, there are 60 seconds in one minute and thus the number of milliseconds in a minute is then obtain by multiplying the number of milliseconds in a second by the number of seconds in a minute, $$\displaystyle{1}\min={60}{s}={1000}\cdot{60}{m}{s}$$
Next, there are 60 minutes in one hour and thus the number of milliseconds in an hour is then obtain by multiplying the number of milliseconds in a minute by the number of minutes in a. hour.
$$\displaystyle{1}{h}={60}\min={1000}\cdot{60}\cdot{60}{m}{s}$$
Next, there are 24 hours in a day and thus the number of milliseconds in a day is then obtain by multiplying the number of milliseconds in an hour by the number of hours in a day.
1 day = $$\displaystyle{24}{h}={1000}\cdot{60}\cdot{60}\cdot{24}{m}{s}$$
Finally, we assume that there are 365 days in a year (assuming no leap years). The number of milliseconds in a. year is then obtain by multiplying the number of milliseconds in a. day by the number of days in a year.
1 year = 365 days = 1000-60. 60.24. 365 msZSK
We then note that the correct operation is $$\displaystyle{1000}\cdot{60}\cdot{60}\cdot{24}\cdot{365}.$$