Because 4 and 5 are relatively prime, meaning that their greatest common factor is one, their least common multiple is 4*5, which is 20. So any number divisible by 20 is divisible by 5 and 4.
A Venn diagram for numbers divisible by both 4 and 5 would have two overlapping circles. One circle would represent numbers divisible by 4, while the other circle would represent numbers divisible by 5. The overlapping region where the two circles intersect would represent numbers divisible by both 4 and 5. This intersection would include numbers that are multiples of both 4 and 5, such as 20, 40, 60, and so on.
Well, honey, numbers that are divisible by 4 and 5 are simply multiples of their least common multiple, which is 20. So, any number that can be divided by both 4 and 5 without a remainder is fair game. Just think of it as the love child of 4 and 5, born to make your math problems a little less complicated.
There are 278 5-digit numbers less than 20,000 that are divisible by both four and nine.
To be divisible by both 4 and 5, the number has to be divisible by 20. Therefore, there are 12 numbers between 1 and 240, inclusive, which are divisible by 4 and 5: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240.
They are both divisible by 1, 2, 4, 5, 10, and 20.
There are infinitely many numbers divisible by 5 and 4. 680 is one of them.
740 is divisible by both 4 and 5.
All whole numbers are divisible by 1. Numbers are divisible by 2 if they end in 2, 4, 6, 8 or 0. Numbers are divisible by 3 if the sum of their digits is divisible by 3. Numbers are divisible by 4 if the last two digits of the number are divisible by 4. Numbers are divisible by 5 if the last digit of the number is either 5 or 0. Numbers are divisible by 6 if they are divisible by 2 and 3. Numbers are divisible by 9 if the sum of their digits is equal to 9 or a multiple of 9. Numbers are divisible by 10 if the last digit of the number is 0.
Since both 3 and 5 are prime numbers, only numbers that are multiples of its product are the numbers that are divisible by both. 15 is the LCM of 3 and 5 and hence all multiples of 15 are divisible by both 3 and 5
40
90
345 and 218