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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 and 5

B

1,3,7 or9

C

7 or 9

D

1 or 7

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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.

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?

Property 6 The units digit of the square of a natural number is the units digit of the square of the digit at units place of the given natural number.

ARIHANT SSC-FUNDAMENTALS -EXERCISE - MISCELLANEOUS
  1. The simplified value of sqrt(900) + sqrt(0.09) - sqrt(0.000009) is

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  2. The greatest integer that divides 358, 376, 232 leaving the same remai...

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  3. The units digit of every prime number (other than 2 and 5) must be nec...

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  4. If the number 243 x 51 is divisible by 9 then the value of the digit m...

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  5. The GCD of two whole numbers is 5 and their LCM is 60. If one of the n...

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  6. The number of possible pairs of numbers , whose product is 5400 and HC...

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  7. The least number which when divided by 2,3, 4,5 and 6 leaves the remai...

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  8. Three bells, toll at interval of 36 sec, 40 sec and 48 sec respectivel...

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  9. A has certain amount in his account. He gives half of this to his elde...

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  10. If x + y + z= 0, then x^3 + y^3 + z^3 is equal to :

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  11. The remainder when x^4 - y^4 is divided by x - y is:

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  12. if x-1/x =2 , then the value of x^4 + 1/x^4 is

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  13. If the sum and the product of two numbers are 25 and 144 respectively ...

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  14. The sum of two numbers is 9 and the sum of their squares is 41. The nu...

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  15. If 3^n = 27 then 3^(n - 2) is:

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  16. If a = b^x , b = c^y, c = a^z, then xyz is :

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  17. If p = x^(1//3) + x^(-1//3), then p^3 - 3p is equal to :

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  18. The sum of squares of first ten natural numbers is :

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  19. If a language of natural numbers has binary vocabulary of 0 and 1, the...

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  20. The least number which must be substracted from 6708 to make it exactl...

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