The difference between the local value and the face value of $7$ in the numeral $32675149$ is
Aptitude
Number System
Difficulty: Easy
Choose an option
-
A5149
-
B64851
-
C69993
-
D75142
-
ENone of these
Answer
Correct Answer: 69993
Explanation
### Concept & Logic
"Local value" is a synonym for **place value**. The question requires finding the place value of a digit and subtracting its constant **face value**.
### Step-by-Step Solution
**Given:**
The numeral is $32675149$. We need the difference between the local (place) value and face value of the digit $7$.
**Calculation:**
1. The digit $7$ is in the ten-thousands place (four digits follow it). Its local value is $70000$.
2. The face value of the digit $7$ is exactly $7$.
3. Calculate the difference:
$$70000 - 7 = 69993$$
### Exam Strategy & Shortcut
When subtracting a single digit from a perfect power of 10 base (like $70000 - 7$), the last digits of the answer will always be derived from $100 - 7 = 93$. Quickly look for the option that ends in $93$.
### Common Pitfall
Failing to recognize that "local value" means "place value." If you assume local value means face value, you get $7 - 7 = 0$, which isn't an option, causing unnecessary panic during an exam.
### Final Answer
Therefore, the correct answer is **69993**.