Question:
What is the missing number in the following sequence? 720, ?, 120, 30, 6, 1
What is the missing number in the following sequence? 720, ?, 120, 30, 6, 1
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If a sequence drops very quickly, try reading it backwards as a multiplication sequence.
Updated On: Jul 3, 2026
- 160
- 200
- 360
- 240
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The Correct Option is C
Solution and Explanation
Step 1: Concept
This is a factorial-based sequence or a division sequence where each term is divided by a decreasing integer.
Step 2: Meaning
Reading from right to left, we see: $1 \times 6 = 6$; $6 \times 5 = 30$; $30 \times 4 = 120$.
Step 3: Analysis
Continuing this increasing multiplication: $120 \times 3 = 360$. To check the final step, $360 \times 2 = 720$.
Step 4: Conclusion
The missing number is $360$, as it fits the progression of dividing the previous number by $n, n-1, n-2...$. Final Answer: (C)
This is a factorial-based sequence or a division sequence where each term is divided by a decreasing integer.
Step 2: Meaning
Reading from right to left, we see: $1 \times 6 = 6$; $6 \times 5 = 30$; $30 \times 4 = 120$.
Step 3: Analysis
Continuing this increasing multiplication: $120 \times 3 = 360$. To check the final step, $360 \times 2 = 720$.
Step 4: Conclusion
The missing number is $360$, as it fits the progression of dividing the previous number by $n, n-1, n-2...$. Final Answer: (C)
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