Odd and Even Numbers

In mathematics, numbers can be classified into two main categories: odd and even numbers. Odd numbers are those that are not divisible by 2, while even numbers are divisible by 2.

Explanation:
In the given numeral group, we need to identify the odd numeral. Let's analyze each numeral group to determine the odd one out.

a) 6538: This numeral group contains four digits. To determine if it is odd or even, we need to check the last digit. In this case, the last digit is 8, which is even. Therefore, 6538 is an even number.

b) 4756: Similar to the previous numeral group, we need to analyze the last digit. In this case, the last digit is 6, which is even. Therefore, 4756 is also an even number.

c) 3475: Now, let's analyze this numeral group. The last digit is 5, which is odd. Therefore, 3475 is an odd number.

d) 7319: Finally, let's analyze this numeral group. The last digit is 9, which is odd. Therefore, 7319 is also an odd number.

Conclusion:
Out of the given numeral group, the odd numeral is 3475. This numeral group is different from the others because it contains an odd number, while the other numeral groups contain even numbers.