Mathematics · Logical Reasoning
If in the number '78742639258', the prime digits are increased by 1 and the non-prime digits are left unchanged, how many digits in the newly formed number will appear exactly once?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Three✓
- 2Two
- 3One
- 4None
Correct answer
Three
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