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The expression 2^(6n) - 4^(2n), where n ...

The expression `2^(6n) - 4^(2n)`, where n is a natural number is always divisible by

A

15

B

18

C

36

D

48

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GAGAN PRATAP -NUMBER SYSTEM-Multiple Choice Questions
  1. The expression 5^(2n) - 2^(3n) has a factor

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  2. (49)^(15)-1 is exactly divisible by:

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  3. The expression 2^(6n) - 4^(2n), where n is a natural number is alway...

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  4. If a and b are two odd positive integers. By which of the following in...

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  5. The remainder when 3^21 is divided by 5 is

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  6. If 17^(200) is divided by 18, the remainder is

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  7. If (67^67 + 67) is divided by 68, the re- mainder is:

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  8. If x is the remainder when 3^61284 is divided by 5 and y is the remain...

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  9. (10^(1)+10^(2)+10^(3)------+10^(100))/(6) find R.

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  10. Find the largest number, which exactly divides every number of the fro...

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  11. A number when divided successively by 4 and 5 leaves remainders 1 and ...

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  12. A number divided by 13 leaves a remainder 1 and if the quotient, th...

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  13. Which of the following cannot be the unit digit of a perfect square nu...

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  14. What is the unit digit of the sum of first 111 whole numbers

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  15. The digit in unit's place of the product 81 xx 82 xx 83 xx... xx 89 is

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  16. If the unit digit of (433 xx 456 xx 43N) is (N + 2), then what is the ...

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  17. What is the unit digit of (217)^(413)xx(819)^(547)xx(414)^(624)xx(342)...

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  18. What is the digit in the unit's place of the number represented by 3^9...

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  19. Let x= (633)^24- (277)^38+ (266)^54. what is the unit digit of x? मा...

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  20. If x=(164)^169+ (333)^337- (727)^726, then what is the unit digit of x...

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