Square Root and Cube Root problems
- 1. ? 0.0009 + ? 0.01 =?
Options- A. 3
- B. 0.3
- C. 1/3
- D. None of these Discuss
Correct Answer: 0.3
Explanation:
Given expression = ?0.0009 / ?0.01
= ?0.0009 / 0.0100
= ?9 / 100
= ?9 / ?100
= 3 / 10
= 0.3
- 2. ? 0.01 + ?0.0064 =?
Options- A. 0.3
- B. 0.03
- C. ?0.18
- D. None of these Discuss
Correct Answer: 0.3
Explanation:
Given expression = ?0.01 + 0.08
=?0.09
= 0.3
- 3. The value of ? 0.9 is?
Options- A. 0.3
- B. 0.03
- C. 0.33
- D. 0.94 Discuss
Correct Answer: 0.94
Explanation:
?0.9 = ?0.90
= ?90/100
= ?90/10
= 9.4/10
= 0.94
- 4. (? 24 + ? 216) / ? 96 =?
Options- A. 2?6
- B. 6?2
- C. 2
- D. 2/?6 Discuss
Correct Answer: 2
Explanation:
(?24 + ?216) / ?96
= (?4 x 6 + ?36 x 6 ) / ?16 x 6
= 2?6 + 6?6
= 8?6 / 4?6
= 2
- 5. 1/ (? 9 - ? 8) =?
Options- A. (3 - 2?2) / 2
- B. 1/ (3 + 2?2)
- C. (3- 2?2)
- D. (3 + 2?2) Discuss
Correct Answer: (3 + 2?2)
Explanation:
Exp. = 1 / (?9 - ?8)
= [1 / (?9 - ?8)] x [(?9 + ?8) / (?9 + ?8)]
= (3 + 2?2 ) / (9 - 8)
= (3 + 2?2)
- 6. The value of ? 0.16 / 0.4 is?
Options- A. 0.2
- B. 0.02
- C. 0.63
- D. 2?5/5 Discuss
Correct Answer: 0.63
Explanation:
Exp. = ?0.16 / 0.40
= ?16 / 40
= ?4 / 10
= ?0.4
= ?0.40
= ?40 / 100
= ?40 / 10
= 6.3 / 10
= 0.63
- 7. The value of ? 0.064 is?
Options- A. 0.8
- B. 0.08
- C. 0.008
- D. 0.252 Discuss
Correct Answer: 0.252
Explanation:
?0.064 = ?0.0640
= ?640/10000
= ?640 / 100
= 25.2/100
= 0.252.
- 8. The value of ? 0.121 is?
Options- A. 0.11
- B. 1.1
- C. 0.347
- D. 0.011 Discuss
Correct Answer: 0.347
Explanation:
?0.121 = ?0.1210
= ?1210/10000
= ?1210 / 100
= 34.7 / 100
= 0.347.
- 9. The cube root of .000027 is?
Options- A. .3
- B. .03
- C. .003
- D. None of these Discuss
Correct Answer: .03
Explanation:
(.000027)1/3
= (27 / 1000000)1/3
= (33)1/3 / (106)1/3
= 3 / 100
= .03
- 10. Find the least number which when multiplied with 74088 will make it a perfect square.
Options- A. 42
- B. 44
- C. 46
- D. 48 Discuss
Correct Answer: 42
Explanation:
74088 = 2 x 2 x 2 x 3 x 3 x 3 x 7 x 7 x 7
= (2x2) x (3x3) x (7x7) x (2x3x7)
Least number which should be multiplied to 74088 to make it a Perfect square = 2 x 3 x 7 = 42
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