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A prime number contains the digit X at unit’s place. How many such digits of X are possible?
  • a)
    3
  • b)
    4
  • c)
    5
  • d)
    6
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A prime number contains the digit X at unit’s place. How many su...
For prime no units place cannot be occupied by even number except for 2 Thus no of digits occupying unit digit of prime numbers = 6 (1,2,3,5,7,9) Example 2,3,5,7,11,19 in itself are prime numbers
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A prime number contains the digit X at unit’s place. How many su...
A prime number can contain any digit, including X, at the unit place. The primality of a number is determined by its divisibility only, not by the specific digits it contains. Therefore, a number with X at the unit place can still be prime if it meets the criteria for primality.
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A prime number contains the digit X at unit’s place. How many such digits of X are possible?a)3b)4c)5d)6Correct answer is option 'D'. Can you explain this answer?
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