Cassandra from Impington Village College (Cambridge) says that the 5 appears 170 times on a 24 hour clock and has clearly explained how she worked that out: I counted how many times the 5 was in the units of the minutes (eg 01:25) each hour (6 times) then multiplied it by 24 (144).
How many times does the number 5 appear on a 12 hour clock?
However, if you were to count how many fives when you look at the clock every minute (so, for example, at 05:53 there are two, then at 05:54 there are two, and at 05:55 there are three and so on) it would be 504 times. This isn’t including seconds of course! The answer is the same for a 12-hour clock.
How many times does 5 appear?
From the range of numbers 0 to 99, the digit 5 appears 20 times.
How many times does 1 appear on a 24 hour digital clock?
To find , for each hour (except 05:XX and 15:XX), we must associate the minutes that don’t contain a 5. So the answer is 450 (24 x 60 – 22 x 45). That’s 1 time. The next time will be at 00:15, 00:25, 00:35 and 00:45.
How many digits are in a clock?
Most modern clocks have the numbers 1 through 12 printed at equally spaced intervals around the periphery of the face with the 12 at the top, indicating the hour, and on many models, sixty dots or lines evenly spaced in a ring around the outside of the dial, indicating minutes and seconds.
How does the 24 hour time work?
The 24-hour clock uses the numbers 00:00 to 23:59 (midnight is 00:00). … They move onto reading the time to the quarter hour and then the nearest five minutes. They also start to learn about time intervals (working out the length of time between two times). In Year 3, children learn that there are 60 seconds in a minute.
How many times will this clock show three of the same number for one twenty four hour period?
A series of three or more of the same digit appears 34 times over the course of 24 hours.
How many times does the digit 5 appears from 1 to 100?
5, 15, 25, … , 95: There are ten 5s at the unit’s place. 50, 51, …, 59: There are ten 5s at the ten’s place. So, the total number of times digit 5 appears between 1 to 100 = 20 times.
How many fives are there in 200?
=40 is your answer.
How many 5’s are there in 100?
Answer: 20 times digit 5 is used between 1 and 100.
How many displayed times in a 24 hour period contain at least one occurrence of the digit 5?
Therefore, the total number of different times displaying at least one occurrence of the digit ‘5’ is 2 × 60 + 22 × 15 = 450.
Why there is only 12 in a clock?
There are 12 numbers on a clock from 1 starting and ending at 12. Because Earth takes 24 hours for one rotation therefore day and night divided in equal 12 hours. But there are digital clocks which are 24 hour clocks representing 24 hours of rotation of earth.
Why does a clock have only 12 digits rather than having 24 digits?
The Ancient Egyptians liked to count in twelves and they divided the day into two lots of twelve hours – 12 for daytime and 12 for nighttime. So one whole day lasts for 24 hours. Each hour lasts the same amount of time and can be divided up into 60 minutes; and each of those minutes can be divided up into 60 seconds.
Why does the clock only go to 12?
Anyway, as near as I can tell, the 12-hour clock goes way back to ancient Mesopotamia and Egypt. The Egyptians used a 12-hour sundial to tell time during the daytime and a 12-hour water clock at night. … Early mechanical clocks showed all 24 hours, but over time, clockmakers found the 12-hour system simpler and cheaper.