For example, 23 and 32 can be a mystery number because they are reverse of each other. Question: Explain what is a mystery number?Īnswer: Mystery number refers to a number that we can express as a sum of two numbers and those two number should be reverse of each other. Zero is the first non-negative integer because we can divide it by two without any difficulty.
Question: State the first non-negative even number?Īnswer: The answer is zero because it is the first non-negative even number, while two is the first positive even number. Also, even the number that is not positive can be integers too. However, an integer that is not an even number is an odd number. Two odd numbers add up to give an even number.Īnswer: Even numbers refer to an integer then we can divide by two and it remains an integer or has no remainder. Solution: The sum of two even numbers is always an even number. Problem: What is the sum of two even numbers? What is the sum of two odd numbers? The above number will leave 1 as a remainder when divided by 2. Solution: The unit digit of the given number is 1 which is odd. When we subtract any two odd numbers, we get an even number. This shows that the product of any two odds is an odd number. What do you get? An even number? Multiply the two odd numbers? What is the product? An odd number.
The sets of even number are expressed as Even =. Even numbers have 0, 2, 4, 6 or 8 as their unit digit. Even numbers leave 0 as a remainder when divided by 2. The numbers which are divisible by 2 are even numbers. The whole numbers are said to consist of two types of numbers – even numbers and odd numbers. When 0 is subtracted from any number, it remains the same.When 0 is added to any number, nothing changes.Any number, when multiplied by 0, gives 0.1 has the predecessor which is a whole number and not a natural number. When we add 0 to the group of natural numbers, we get whole numbers. Suppose you have 5 chocolates and you distribute them among your friends. What is the predecessor of 1? Does that predecessor is also a natural number? No, no natural number is the predecessor of 1. Is there any natural number that has no predecessor? The predecessor of 2 is 1. If we add 1 to any natural numbers, it gives its successor (next number). It is interesting to know that if we subtract 1 from any natural number, we get its predecessor (previous number). The natural numbers are the counting numbers.
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