Discussion
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- Question
P alone can complete a piece of work in 6 days. Work done by Q alone in one day is equal to one-third of the work done by P alone in one day. In how many days can the work be completed if P and Q work together ?
Options- A. 5 (2/3)
- B. 6 (3/4 )
- C. 4 (1/2)
- D. 3
- Correct Answer
- 4 (1/2)
ExplanationWork done by P alone in one day = 1/6th of the total work done by Q alone in one day = 1/3(of that done by P in one day) = 1/3(1/6 of the total) = 1/18 of the total.
Work done by P and Q, working together in one day = 1/6 + 1/18 = 4/18 = 2/9
They would take 9/2 days = 4 (1/2) days to complete the work working together.
- 1. In the question, two equations I and II are given. You have to solve both the equations and give answer x2-11x+28=0y2-18y+81=0
Options- A. x > y
- B. x < y
- C. x=y, or relation cannot be established between x and y
- D. x ? y Discuss
- 2. What should come in place of question mark (?) in the following question? 115 ÷ 5 + 12 × 6 = ? + 64 ÷ 4 - 35
Options- A. 95
- B. 136
- C. 102
- D. 74 Discuss
- 3. What should come in place of question mark (?) in the following question? 1234 + 2345 ? 3456 + 4567 = ?
Options- A. 4590
- B. 4680
- C. 4670
- D. 4690 Discuss
- 4. What is the y ? intercept of the linear equation 59x + 14y ? 112 = 0?
Options- A. 8
- B. 14
- C. 28
- D. 59 Discuss
- 5. What is the value of (sin60° + 2/?3) ?
Options- A. (2?3+1)/?3
- B. 7/2?3
- C. 3
- D. 2+?3 Discuss
- 6. Solve the following equation to find x: (x ? 2)2 ? 36 = 0 : x?N
Options- A. 4
- B. 8
- C. -4
- D. -8 Discuss
- 7. The zeros of the cubic polynomial 2x3-x2-2x+1 are a, b and c respectively. Find a+b+c :
Options- A. -1
- B. 2
- C. 1
- D. none Discuss
- 8. The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:
Options- A. (7x ? 1)(8x ? 1) = 0
- B. (7x ? 1)(8x + 1) = 0
- C. (7x + 1)(8x ? 1) = 0
- D. (7x + 1)(8x + 1) = 0 Discuss
- 9. Reflection of the point (2,7) in the yaxis is
Options- A. (2,7)
- B. (-2,-7)
- C. (-7,2)
- D. (7,2) Discuss
- 10. 6.651 - (148.6 - x ) - 57.22 = 6.098. Find x.
Options- A. 205.267
- B. 90.827
- C. -91.933
- D. 218.569 Discuss
More questions
Correct Answer: x < y
Explanation:
x2 ? 11x + 28=0
x2 ? 7x ? 4x + 28=0
x (x-7) ? 4 (x-7)=0
(x-4) (x-7)=0 x=4, 7
y2 ? 18y + 81=0
y2 ?9y ? 9y + 81=0
y (y-9) ? 9 (y-9)=0
(y-9) (y-9)=0 y=9, 9
So, x<y.
Correct Answer:
Explanation:
As per the BODMAS rule, the priority in which the operations should be done is:
| Priority wise operations | Symbol |
| B-Bracket | () |
| O-of | of |
| D-Division | /,÷ |
| M-Multiplication | *,x |
| A-Addition | + |
| S-Subtraction | - |
Note: Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order.
(115/5) + 12 × 6 = ? + (64/4) ? 35 23 + 72 = ? + 16 ? 35 95 = ? - 19 95+19 = ? ? = 114
Correct Answer: 4690
Explanation:
As per the BODMAS rule, the priority in which the operations should be done is:
| Priority wise operations | Symbol |
| B-Bracket | () |
| O-of | of |
| D-Division | /,÷ |
| M-Multiplication | *,x |
| A-Addition | + |
| S-Subtraction | - |
Note: Addition and subtraction can be treated on same priority (from left to right) when they are in consecutive order. ? = 1234 + 2345 ? 3456 + 4567 ? = 3579 - 3456 + 4567 ? = 123 + 4567 ? = 4690
Correct Answer: 8
Correct Answer: 7/2?3
Correct Answer: 8
Correct Answer: none
Correct Answer: (7x ? 1)(8x + 1) = 0
Correct Answer: (-2,-7)
Correct Answer: 205.267
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