Which number is divisible by 5? This question may seem simple at first glance, but it opens up a world of mathematical exploration. In this article, we will delve into the concept of divisibility by 5, discuss the properties of numbers divisible by 5, and explore some interesting examples in real life.
Numbers divisible by 5 are those that can be evenly divided by 5 without leaving a remainder. In other words, when a number is divisible by 5, it is a multiple of 5. To determine if a number is divisible by 5, we can look at the last digit of the number. If the last digit is either 0 or 5, then the number is divisible by 5.
For instance, consider the number 25. The last digit is 5, which means 25 is divisible by 5. Similarly, the number 30 has a last digit of 0, making it divisible by 5 as well. On the other hand, the number 23 is not divisible by 5, as its last digit is 3, and dividing 23 by 5 leaves a remainder of 3.
Numbers divisible by 5 have some interesting properties. First, they always end in 0 or 5. This is because any number multiplied by 5 will end in either 0 or 5. For example, 5 x 1 = 5, 5 x 2 = 10, 5 x 3 = 15, and so on. Second, the sum of the digits of a number divisible by 5 is also divisible by 5. For instance, the number 12345 has a sum of digits equal to 1 + 2 + 3 + 4 + 5 = 15, which is divisible by 5.
In real life, numbers divisible by 5 are quite common. For example, time is often measured in units of 5, such as minutes, hours, and five-minute intervals. The metric system also utilizes numbers divisible by 5, with units like meters, kilograms, and liters. In addition, many currencies have denominations that are multiples of 5, such as the US dollar, which is divided into 100 cents, or the Indian rupee, which is divided into 100 paise.
To sum up, the question “which number is divisible by 5” is a fundamental mathematical concept with various applications in everyday life. By understanding the properties of numbers divisible by 5, we can better appreciate the significance of this divisibility rule in various contexts.
