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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 1ˢᵗ digit from the left and the 7ᵗʰ digit from the right?
10
14
12
13
13
To find the Nth digit from the right, count positions starting from the far right end index. Locate the specific digits and add them.
To find the Nth digit from the right, count positions starting from the far right end index. Locate the specific digits and add them.
Identify 1st digit from the left
Looking at the provided series: 7, 2, 1, 5, 7, 6, 8, 9, 7, 6, 4, 9, 8, 1, 6, 5, 9, 5, 8, 6, 2, 6, 9, 5, 4, 9, 6, 3, 0, 3. The 1st digit from the left is 7.
Identify 7th digit from the right
Starting from the right end: 1st=3, 2nd=0, 3rd=3, 4th=6, 5th=9, 6th=4, 7th=5. The 7th digit from the right is 5.
Calculate the sum
The sum of the 1st digit from the left (7) and the 7th digit from the right (5) is 7 + 5 = 12.
A: 10 is incorrect. B: 14 is incorrect. D: 13 is incorrect. Only 12 (Option C) is the correct sum.
C is correct because the 1st digit from the left is 7 and the 7th digit from the right is 5, making their sum 12.
Always count carefully from the specified direction (Left vs Right). It is helpful to index the digits or cross them out as you count to avoid skipping any positions.
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