Question

The number of teeth and the age of a person vary:

• A. directly with each other
• B. inversely with each other
• C. neither directly nor inversely with each other
• D. sometimes directly and sometimes inversely with each other

Answer 1

The correct option is D

sometimes directly and sometimes inversely with each other

The correct option is D.

The explanation for the correct option:

1. The age of a person isn’t directly proportional to the number of teeth a person possesses.
2. This is because the age of person doesn’t influence the number of teeth a person possess.
3. Teeth can decrease in number due to various external reasons like cavities, tooth damage, etc.

The explanation for the incorrect options:
Option A: This isn’t true as it depends on various external factors.

Option B: This doesn’t hold true always this is because as the age increases the number of teeth decreases however a new born child doesn’t have the highest number of teeth.

Option C: This is also not true , this is because the number of teeth is not permanent. It also depends on the age and also depends on the external characteristics such as life style, damage etc.

Final answer : The number of teeth and the age of a person vary sometimes directly and sometimes inversely with each other.