Discussion
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- Question
If a + b + c = 27, then what is the value of (a ? 7)3 + (b ? 9)3 + (c ? 11)3 ? 3(a ? 7)(b ? 9)(c ? 11) ?
Options- A. 0
- B. 9
- C. 27
- D. 3
- Correct Answer
- 0
- 1. If x = 6+26 , then what is the value of x-1 + 1x-1 ?
Options- A. 2?3
- B. 3?2
- C. 2?2
- D. 3?3 Discuss
- 2. In the following question, correct the equation by interchanging two signs. 4 x 3 ? 6 ÷ 2 + 7 = 8
Options- A. ? and +
- B. x and ?
- C. ÷ and x
- D. x and + Discuss
- 3. ( 1155 ) +(18 ? 6) × 9 =?
Options- A. 113
- B. 115
- C. 100
- D. 110 Discuss
- 4. Out of the 60 students of a class, 29 took Mathematics, 32 took Biology and 8 took none of the two subjects. How many students took both Mathematics and Biology?
Options- A. 8
- B. 9
- C. 7
- D. 6 Discuss
- 5. If 'Q ' means ' +', 'J ' means ' X',T ' ' means '- ' and 'K ' means ' ÷ ', then what is the value of18K3Q7J ?
Options- A. 15
- B. 10
- C. 18
- D. 12 Discuss
- 6. What is the smplified value of Sin2A/1+Cos2A ?
Options- A. tan A
- B. cot A
- C. sin A
- D. cos A Discuss
- 7. What is the simplified value of Sec ACot A + Tan A2 ?
Options- A. 1 ? cos2A
- B. 2sin2A
- C. sec2A
- D. 0 Discuss
- 8. The mode of the data -3, 4, 0, 4, -2, -5, 1, 7, 10, 5 is
Options- A. 0
- B. 4
- C. -2
- D. 7 Discuss
- 9. Given that tan(? + 15°) = ?3. Then the value of ? is?
Options- A. 15°
- B. 75°
- C. 45°
- D. 65° Discuss
- 10. A bag contains 25 paise, 50 paise and 1 Rs coins. There are 220 coinsinall and the total amount in the bag is Rs. 160. If there arethrice as many 1 Rs. coins as there are 25 paise coins, then what is the number of 50 paise coins?
Options- A. 60
- B. 40
- C. 120
- D. 80 Discuss
Simplification problems
Search Results
Correct Answer: 2?3
Correct Answer: ? and +
Correct Answer: 113
Explanation:
Given,( ) +(18 ? 6) =?
=5 + 12 × 9
=5 + 108
=113
Correct Answer: 9
Explanation:
Number of students who took only Mathematics n(m) = 29
Number of students who took only biology n(b) = 32
Total number of students n(t) = 60
Total number of students of both mathematics and biology n(m b) = 60 - 8 = 52
Total number of students who took both = 32 + 29 - 52 = 9
Correct Answer: 12
Correct Answer: tan A
Correct Answer: 1 ? cos2A
Correct Answer: 4
Correct Answer: 45°
Correct Answer: 60
Explanation:
Let there be x one rupee coin, y 50 paise coin, z 25 paise coinx + y + z = 220......(i)
Total amount = 160
Now, x + (y/2) + z = 160 ......(ii)
?4x + 2y + z = 640
Thrice as many 1 re coin as 25 paise
?x = 3z ......(iii)
On solving equation (i), (ii) and (iii), we get
z = 40x= 3* 40 = 120y = 220 ?(120 + 40 ) = 60
So, 50 paise coin =60
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