Choose the correct option that continues the given pattern in the series. 50,…
2023
Choose the correct option that continues the given pattern in the series.
50, 30, 55, 25, 60, _____, 65
- A.
40
- B.
30
- C.
25
- D.
20
Attempted by 6 students.
Show answer & explanation
Correct answer: D
To find the missing number in the series 50, 30, 55, 25, 60, __, 65, we need to analyze the pattern. This series is actually composed of two alternating sub-sequences.
Analyzing the Pattern
First sub-sequence (1st, 3rd, 5th, 7th terms):
50, 55, 60, 65
Pattern: Each term increases by 5 (50 + 5 = 55; 55 + 5 = 60; 60 + 5 = 65).
Second sub-sequence (2nd, 4th, 6th terms):
30, 25, __
Pattern: Each term decreases by 5 (30 - 5 = 25; 25 - 5 = 20).