Find the difference between the place values of the two 7s in 69758472.
Aptitude
Numbers
Difficulty: Easy
Choose an option
-
A699930
-
B699970
-
C699900
-
D700070
Answer
Correct Answer: 699930
Explanation
Given data
- Number: 69758472 (8 digits)
- Two 7s: positions from left are 3rd and 7th digits.
Concept / Approach
- Place value = digit × (place weight). From right, weights are 1, 10, 100, 1000, …
Step-by-step identification
Digits (with place): 6(10^7), 9(10^6), 7(10^5), 5(10^4), 8(10^3), 4(10^2), 7(10^1), 2(10^0)Place value of left 7: 7 × 10^5 = 700000Place value of right 7: 7 × 10^1 = 70Difference = 700000 − 70 = 699930
Verification
Both place values computed from positional weights; subtraction straightforward.
Common pitfalls
- Confusing face value (7) with place value (e.g., 700000).
- Off-by-one in counting positions from the right.
Final Answer
699930