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3^3.5xx21^2xx42^2.5-:2^2.5xx7^3.5=21^? a...

`3^3.5xx21^2xx42^2.5-:2^2.5xx7^3.5=21^?` a. 6.5 b. 8 c. 10 d. 12.5 e. None of these

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RS AGGARWAL-SURDS AND INDICES-All Questions
  1. (17)^(3. 5)xx(17)^?=17^8\ a. 2. 29 b. 2. 75 c. 4. 25 d. 4. 5

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  2. 6^1.2xx36^?xx30^2.4xx25^1.3=30^5 a. 0.1 b. 0.7 c. 1.4 d. 2.6 e. None o...

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  3. 3^3.5xx21^2xx42^2.5-:2^2.5xx7^3.5=21^? a. 6.5 b. 8 c. 10 d. 12.5 e. No...

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  4. 8^(0. 4)xx4^(1. 6)xx2^(1. 6)=? 48 b. 64 c. 52 d. 76 e. none of these

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  5. 8^7xx2^6-:8^2.4=8^? a. 6.6 b. 8.6 c. 9.6 d. 10.6

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  6. 8^(2. 4)xx2^(3. 7)xx-(16)^(1. 3)=2^? 4. 8 b. 5. 7 c. 3. 2 d. 3. 6 e....

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  7. (18)^(3. 5)-:(27)^(3. 5)xx6^(3. 5)=2^? a. 3. 5 b. 4. 5 c. 6 d....

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  8. (25)^(7. 5)xx(5)^(2. 5)-:(125)^(1. 5)=5^? 8. 5 b. 13 c. 16 d. 17. 5 ...

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  9. The value of (243^0.13xx243^0.07)/(7^0.25xx49^0.07xx343^0.2) is a. 3...

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  10. (64x^3-:27\ a^(-3))^(-2//3)= a. (9ax)/16 b. 9/(16ax) c. 9/(16x^2a^2) d...

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  11. If 2^(n+4)-2^(n+2)=3, then n is equal to a. 0 b. 2 c. -2 d. -1

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  12. (2^(n+4)-2xx2^n)/(2xx2^(n+3))+2^(-3) is equal to a. 2^(n+1) b. (9/8 - ...

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  13. The value of (2^(3x+4)+8^(x+1))/(8^(x+1)-2^(3x+2)) is a. 3 b. 4 c. 5 d...

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  14. The value of (2^(n-1)-2^n)/(2^(n+4)+2^(n+1)) is a. -1/(36) b. 2/3 c. 1...

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  15. If x=5+2sqrt(6), then sqrt(x)-1/(sqrt(x)) is a. 2sqrt(2) b. 2sqrt(3) c...

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  16. (4+sqrt(7)) expressed as a perfect square, is equal to (2+sqrt(7))^2 b...

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  17. sqrt(8-2sqrt(15)) is equal to 3-sqrt(5) b. sqrt(5)-sqrt(3) c. 5-sqrt(3...

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  18. sqrt(6-4sqrt(3)+sqrt(16-8sqrt(3))) is equal to 1-sqrt(3) b. sqrt(3)-1 ...

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  19. The value of 1/(sqrt(12-sqrt(140)))-1/(sqrt(8-sqrt(60)))-2/(sqrt(10+sq...

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  20. The value of the expression sqrt(4+sqrt(15))+sqrt(4-sqrt(15))-sqrt(12-...

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