Any number can be divided by one and itself, and any other number will result in a fraction.
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23 is not divisible by 7.
If the number is only divisible by 1 and itself, then that number is called prime number.E.g. 7 is only divisible by 1 and itself, i.e. 7. Hence, 7 is a prime number.
Best way to work this out: find the highest number below 10,000 that is divisible by 7 (9,996) and divide that by 7 (1,428). 1,428 is the amount of one-, two-, three- and four-digit numbers divisible by 7. Now find the number of one-, two- and three-digit numbers divisible by 7 (which is 994/7 = 142) and subtract this number from 1,428, giving us 1,286.
a number is divisible by 12 if the number is also divisible by both 3 and 7. You mean a number is divisible by 21 if it is divisible by 3 and 7.
factors of 34 are: 1,2, 17 and 34. there are an infinite amount of numbers divisible by 34. they way you can find a number divisible by 34 is by multiplying 34 by any number. the answer you get is divisible by 34. example: 7*34=238 238/34=7 (238 is divisible by 34)