Discussion
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- Question
If a-b=1 and a3-b3 = 61 , then the value of ab will be
Options- A. -20
- B. 20
- C. 30
- D. 60
- Correct Answer
- 20
- 1. If p = 99, then the value of p(p2+3p+3) will be
Options- A. 999999
- B. 1000000
- C. 1000001
- D. 999998 Discuss
- 2. If the simple interest on Rs. 1 for 1 month is 1 paisa, then the rate percent per annum will be
Options- A. 10%
- B. 8%
- C. 12%
- D. 6% Discuss
- 3. If ? is positive acute angle and 4sin2? = 3 , then the value of tan ? - cot ?/2 is
Options- A. 1
- B. 0
- C. ?3
- D. 1/?3 Discuss
- 4. If Cot ? = 24/7, then Sin ? = ?
Options- A. 24/25
- B. 8/25
- C. 7/25
- D. 9/25 Discuss
- 5. What is the value of Cot 60°- Sec 45° ?
Options- A. (?2 - ?3)/?6
- B. (?3 - 3?2)/3
- C. (1 - 2?2)/2
- D. (1 - ?3)/2 Discuss
- 6. If xa+b+1=xa-b+a-ba+b , then x is equal to
Options- A. 2a-b
- B. a+b
- C. a-b
- D. 2a+b Discuss
- 7. The value of sec217°-1tan273°-sin17°sec73°
Options- A. 1
- B. 0
- C. -1
- D. 2 Discuss
- 8. If x=aCos?Cos?, y = aCos?Sin? and z= aSin?, then the value of x2+ y2 + z2 is
Options- A. 2a2
- B. 0
- C. 4a2
- D. a2 Discuss
- 9. A 1.6 m tall observer is 45 meters away from a tower. The angle of elevation from his eye to the top of the tower is 30°, then the height of the tower in meters is
Options- A. 25.98
- B. 26.58
- C. 27.58
- D. 27.98 Discuss
- 10. A spherical lead ball of radius 6 cm is melted and small lead balls of radius 3 mm are made. The total number of possible small lead balls is
Options- A. 4250
- B. 4000
- C. 8005
- D. 8000 Discuss
Simplification problems
Search Results
Correct Answer: 999999
Correct Answer: 12%
Correct Answer: 0
Correct Answer: 7/25
Correct Answer: (?3 - 3?2)/3
Correct Answer: a-b
Correct Answer: 0
Correct Answer: a2
Correct Answer: 27.58
Correct Answer: 8000
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