Discussion
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- Question
Mayur can complete a work in 27 hours. If he is joined by Jayantika who is 100% more efficient, in what time will they together finish the work?
Options- A. 6 hours
- B. 3 hours
- C. 9 hours
- D. 10 hours
- Correct Answer
- 9 hours
- 1. If cosec 45° - sin 30° = x, then x is
Options- A. 5/?3
- B. (?6-1)/?2
- C. ?3+2
- D. (2?2-1)/2 Discuss
- 2. If cosA = x, then x is
Options- A. ?(1 - cos2A)
- B. ?(1 + sin2A)
- C. ?(1 + cos2A)
- D. ?(1 - sin2A) Discuss
- 3. If x - 2y = 2 and 3x + y = 20, then the value of (x,y) is
Options- A. (6, 2)
- B. (4, 1)
- C. (3, 2)
- D. (5, 5) Discuss
- 4. If 9x - 6(3 - x) = 12, then the value of x is
Options- A. 2
- B. 4
- C. 6
- D. 9 Discuss
- 5. Which of the following quadratic equations has real roots?
Options- A. 4x2 - 3x + 6 = 0
- B. 2x2 + 7x + 6 = 0
- C. x2 - 2x + 4 = 0
- D. 3x2 - 4x + 3 = 0 Discuss
- 6. If 3x - 2(4 - 3x) < 2x - 5 < 3x + 3; then the value of x is
Options- A. 1
- B. 2
- C. 5
- D. 0 Discuss
- 7. Simplify (b2x 3a2z4 ) × (b2x 4a4z3 )/(a3b2z4 )
Options- A. b2x7a3z3
- B. b3x7a3 z3
- C. b2x5a3 z3
- D. b2x7a3z2 Discuss
- 8. If cos 240° = x, then value of x is
Options- A. -1/?2
- B. -?3/2
- C. 1/2
- D. -1/2 Discuss
- 9. If a + b = 9 and a2+ b2= 61 , then ab is
Options- A. 20
- B. 10
- C. 81
- D. 142 Discuss
- 10. Reflection of the point (2,5) in the x axis is
Options- A. (2,5)
- B. (-2,5)
- C. (2,-5)
- D. (-2,-5) Discuss
Simplification problems
Search Results
Correct Answer: (2?2-1)/2
Correct Answer: ?(1 - sin2A)
Correct Answer: (6, 2)
Correct Answer: 4
Correct Answer: 2x2 + 7x + 6 = 0
Correct Answer: 0
Correct Answer: b2x7a3z3
Correct Answer: -1/2
Correct Answer: 10
Correct Answer: (-2,-5)
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