Find out the missing number in the following sequence.
5, 4, 20, 16, 80, ?, 320, 256
Show answer & explanation
Correct answer: D
Explanation
Given Sequence: 5, 4, 20, 16, 80, ?, 320, 256
Identify the pattern:
The sequence follows a repeating alternating pattern:
5 × 0.8 = 4
4 × 5 = 20
20 × 0.8 = 16
16 × 5 = 80
80 × 0.8 = ?
? × 4 = 320
320 × 0.8 = 256
Apply the pattern
From 80 to the missing number:
80 × 0.8 = 64
Verify
64 × 5 = 320 (matches the sequence)
320 × 0.8 = 256 (matches the sequence)
Hence, the correct answer is option (4).