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The units digit of every prime number (o...

The units digit of every prime number (other than 2 and 5) must be necessarily :

A

1,3 or 5

B

1,3,7 or 9

C

7 or 9

D

1 or 7

Text Solution

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The correct Answer is:
B
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Study the given statements carefully. State T for true and 'F' for false and select the correct option. (i) If a number is a factor of each of the given two numbers, then it must be factor of their a difference. (ii) If a number is divisible by another number, then it must be divisible by each of the factors of that number. (iii) If a number is divisible by another number, then it is also divisible by all the multiples of that number. (iv)No prime number other than 2 is even but every odd number is necessarily a prime number.

(ii) Every prime number except 2 is an odd number.

Knowledge Check

  • If a number is divisible by both 11 and 13, then it must be necessarily :

    A
    divisible by (11 + 13)
    B
    divisible by (13 - 11)
    C
    divisible by `(11 xx 13)`
    D
    429

  • The units digit of the square of a number and the units digits of the cube of the number are equal to the units digits of the number .How many values are possibles for the units digits of such number?

    A
    2
    B
    4
    C
    5
    D
    3

  • The units digit of the square of a number and the units digit of the cube of the number are equal to the units digit of the number. How many values are possible for the units digits of such numbers?

    A
    2
    B
    4
    C
    5
    D
    3

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