Question:
“387924, ________, 3724, 423, 32, 2”. Which number is missing?
“387924, ________, 3724, 423, 32, 2”. Which number is missing?
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In digit manipulation sequences, try reversing and removing digits sequentially.
Updated On: Aug 11, 2025
- 42978
- 42783
- 42983
- 42783
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The Correct Option is C
Solution and Explanation
Step 1: Examine the sequence from right to left
The numbers are decreasing:
2 → 32 → 423 → 3724 → \text{Missing} → 387924
Step 2: Check difference pattern (reverse subtraction)
Backtrack:
32 × 10 + 3 = 323 → Not matching
Try adding digits: 2 × 10 + 1 = 21? No pattern seen
Try digit reversal logic: Start with 387924 (reverse: 429783)
Next should be 42983 (remove 7). Then reverse gives 3724
3724 → reverse = 4273 → approx 423 if last digit drops.
Seems like we're removing one digit per step and reversing:
387924 → remove 8 → 37924 → reverse = 42973
387924 → remove 7 → 38924 → reverse = 42983
Only option that fits this pattern is 42983 % Final Answer \[ \boxed{42983} \]
The numbers are decreasing:
2 → 32 → 423 → 3724 → \text{Missing} → 387924
Step 2: Check difference pattern (reverse subtraction)
Backtrack:
32 × 10 + 3 = 323 → Not matching
Try adding digits: 2 × 10 + 1 = 21? No pattern seen
Try digit reversal logic: Start with 387924 (reverse: 429783)
Next should be 42983 (remove 7). Then reverse gives 3724
3724 → reverse = 4273 → approx 423 if last digit drops.
Seems like we're removing one digit per step and reversing:
387924 → remove 8 → 37924 → reverse = 42973
387924 → remove 7 → 38924 → reverse = 42983
Only option that fits this pattern is 42983 % Final Answer \[ \boxed{42983} \]
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