Quantitative — Recurrence Series Patterns
Question
In a sequence of numbers, each number other than the first two is the sum of the two immediately preceding numbers from it. If the first two numbers in the sequence are 4 and 7, then the sixth number is [cite: 4241, 4242]
Options
29
37
43
47
Explanation
The series follows an additive recurrence rule where T_n = T₍n-1₎ + T₍n-2₎ for all positions n \ge 3 .
Let us calculate the values for each position step-by-step starting from the given initial terms :
Thus, the sixth number in this sequence is exactly 43.
Answer: (c).
Question details
Year
2026
Paper
CSAT
Question
Q37
Section
Logical Reasoning
Sub-topic
Series — Number Pattern
Type
Series & Pattern
Difficulty
Easy
Source hint
Fibonacci-style series — additive recurrence relations
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