Once every hour, so 24 times in a 24-hour day.
Each minute on a clock is 6 degrees. Put one of the hands on 12 and the other hand 17 minutes away.
54(6/11)
If the hands start off together at midnight, say, then the minute hand must catch up with the hour hand 11 times before they both end up on top of each other again at noon. Hence between one and two o'clock the time when the hands are in the same place is 60/11 = 5.4545... minutes past the hour, between two and three o'clock 2*60/11 = 10.9090... minutes past the hour and so on. So the time you want is 10.91 minutes past 2 o'clock which, to the nearest second, is 2:10:54.
3. AB, BC and CA.
Everyone shakes hands with 4 other people. Since there are 5 people in the room this would suggest there are 5*4 = 20 handshakes. However, you would then be double counting handshakes: A shaking hands with B and B shaking hands with A is, in reality, only one handshake. Thus there are 5*4/2 = 10 handshakes in all.
22
Clock dials are used on analog- style (as opposed to digital) clocks and watches. The other term for a clock dial is a clock face, or clockface. It is the part of the clock where the hour and minute hands (and maybe also seconds hands ) appear. Frequently the clock dial also has numbers, from one to twelve representing the hours, as well as five-minute intervals. Sometimes there are evenly spaced dots, instead of numbers. For an illustration of a clock dials, go to the link below.
On an analog clock with a 12-hour face: 44 times. On a digital clock: zero. (No needles.)
As in any other clock, the Big Ben hands have different sizes: -The hour hand is 9ft (2.7m) long. -The minute hand is 14ft (4.25m) long. +++ Big Ben is not the clock, nor the tower, but the hour bell.
Each minute on a clock is 6 degrees. Put one of the hands on 12 and the other hand 17 minutes away.
The hour and minute hands are in a straight line opposite each other at 6 o`clock, and at 10 other times during any 12-hour period, for a total of 22 times a day.They also overlap 22 times a day, at 20 times other than at 12 o'clock.(see related question)
There are many moving parts of a clock, apart from the hands. Examples include a mainspring, or a weight suspended from a cord, the wheel train, and an oscillator.
So you can tell which is which; example if one is on the 1 and the other is on the 2, if the hands were same length it could be 10 past 1, or 5 past 2. And so on ...
2400
22
Eleven.
54(6/11)