Which odd number is less than 81 but more than 77?
A. 77
B. 78
C. 79
D. 80
The correct answer and explanation is:
The correct answer is C. 79.
To explain why 79 is the correct answer, let’s first consider the definition of odd and even numbers. Odd numbers are integers that cannot be divided evenly by 2. These numbers typically end in 1, 3, 5, 7, or 9 in base-10 number system. Even numbers, on the other hand, are divisible by 2 and typically end in 0, 2, 4, 6, or 8.
Now, the question asks for an odd number that is less than 81 but more than 77. To narrow it down:
- 77 is an odd number, but the problem specifically asks for a number greater than 77.
- 78 is an even number, which eliminates it from the possible choices.
- 79 is an odd number, and it fits the condition of being greater than 77 but less than 81.
- 80 is an even number, so it is also excluded.
Thus, 79 is the only number that meets all the criteria: it is an odd number, it is greater than 77, and it is less than 81.
This problem tests the understanding of odd numbers within a specific range. By recognizing the properties of odd and even numbers and applying those rules, you can quickly determine that 79 is the only odd number in the given range.