Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
Refer to the given series and answer the question that follows (all numbers are single-digit numbers only).
What is the sum of the 10th digit from the left and the 4th digit from the right?
10
9
8
11
9
Count positions from ends: index the sequence, identify the target digit at that index, then sum them.
Count positions from ends: index the sequence, identify the target digit at that index, then sum them.
Identify 10th digit from left
Counting from the left (5, 7, 0, 5, 5, 0, 9, 5, 5, 9...), the 10th digit is 9.
Identify 4th digit from right
Counting from the right (5, 2, 1, 0, 1, 2, 7, 4, 9, 6, 8, 9, 6, 6, 8, 2, 1, 9, 8, 5, 5, 9, 0, 5, 5, 0, 7, 5), the sequence ends as 1, 0, 1, 2, 5. The 4th digit from the right is 1.
Calculate sum
Sum of the two identified digits: 9 + 1 = 10.
A: 8 is incorrect, C: 11 is incorrect, D: 9 is incorrect because the specific indices 10th from left (9) and 4th from right (1) result in 10.
B is correct because the 10th digit from the left is 9 and the 4th digit from the right is 1, making their sum 10.
Always verify indices twice—once from left and once from right—and maintain strict counting discipline to avoid off-by-one errors.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download • 100K+ Aspirants