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Refer to the given series and answer the question that follows (all numbers are single-digit numbers only).
What is the sum of the $ 5^{th}$ digit from the left and the $ 2^{nd}$ digit from the right?
8
6
3
7
6
Identify the 5th digit from the left and the 2nd digit from the right by counting along the sequence, then add them.
Identify the 5th digit from the left and the 2nd digit from the right by counting along the sequence, then add them.
Locate 5th digit from left
Counting from the left (9, 5, 4, 1, 0...), the 5th digit is 0.
Locate 2nd digit from right
Counting from the right (...0, 6, 2), the sequence ends in 2, 6, 0. The 2nd digit from the right is 6.
Calculate the sum
Sum = 0 + 6 = 6.
A: Represents the digit 8, which is incorrect. C: Represents the digit 3, which is incorrect. D: Represents the digit 7, which is incorrect.
B is correct because the 5th digit from the left is 0 and the 2nd digit from the right is 6; 0 + 6 = 6.
When counting, double-check your start point; 'from the left' starts index at 1 from the beginning, while 'from the right' starts index at 1 from the last digit.
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