A prime number contains the digit X at unit'splace. How many such digits of X arepossible ?(a) 34(C) 5(d)6.
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Total number of digits of X are possible "option b) 4" is correct.
Step-by-step explanation:
The unit's digit possibe are:
0, 1, 2, 3, 4, 5, 6, 7, 8 and 9
To find, total number of digits of X are possible = ?
The prime numbers are:
2, 3, 5 and 7
Total number of prime numbers = 4
Total number of digits of X are possible = 4
Hence, total number of digits of X are possible "option b) 4" is correct.
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