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If the units digits of a perfect square ...

If the units digits of a perfect square is 4 then the units digit of its square root can be

A

only 2

B

only 8

C

Either a or b

D

Neither a nor b

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The correct Answer is:
C
Recall the properites of square roots
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PEARSON IIT JEE FOUNDATION-SQUARES AND SQUARE ROOTS AND CUBES AND CUBE ROOTS -Level1
  1. The least 4 digit number which is a perfect square is

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  2. An odd number when multiplied by itself gives 2401 find the number

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  3. If the units digits of a perfect square is 4 then the units digit of i...

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  4. What will be the units digit of the squares of the following numbers?

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  5. Which of the following is not a perfect square ?

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  6. The smallest number with which 120 should be multiplied so that the pr...

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  7. The greatest 3 digit number which is a perfect square is

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  8. If p and q are perfect squares then sqrt(p)/(q) is always a rational n...

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  9. root3((-a^6 xx b^3 xx c^(21))/(c^9 xx a^(12)))=………

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  10. If 3(x-2)^(2)=507 then x can be

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  11. The value of sqrt(117^(2)-108^(2))

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  12. The square root of 36/5 when corrected to two decimal places is

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  13. If the product of two equal numbrers is 1444 then the number are

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  14. The cube of the number p is 16 times the number Then find p where p ne

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  15. The cube of a number x is nine times of x then find x x ne 0 and x ne...

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  16. The digit in the units place for the cube of a four digit number of th...

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  17. The digit in the units place for the cube of the number 12345678 is

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  18. Which of the following number becomes a perfect cube when we divide th...

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  19. The least number to be substracted from 220 so that it become a perfec...

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  20. If (x^(y))^z =2^(8)then find the maximum possible value of (x)(y)(z) w...

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