Discussion
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- Question
If x(2x + 3) = 90 and 7y-1/2+ 2y-1/2= y1/2 (x and y are positive numbers), then what is the value of x2+ y2 ?
Options- A. 45
- B. 109
- C. 117
- D. 126
- Correct Answer
- 117
- 1. If a= x13y13+x-13y-13 then a3-3ay-x is equal to
Options- A. y^2x
- B. x^2y
- C. a^2x
- D. a^2y Discuss
- 2. The difference between two numbers is 1146. When we divide the larger number by smaller we get 4 as quotient and 6 as remainder. Find the larger number
Options- A. 1526
- B. 1431
- C. 1485
- D. 1234 Discuss
- 3. Simplify the following equation ? 2003 x 2004 - 2001 x 2002 = ?
Options- A. 8010
- B. 8020
- C. 8030
- D. 8040 Discuss
- 4. 43% of 616.6 + 37% of 217 =?
Options- A. 345.428
- B. 354.428
- C. 344.428
- D. 364.428 Discuss
- 5. In an examination, a student scores 4 marks for every correct answer and loses I mark for every wrong answer. If he attempts in all 60 questions and secures 130 marks, the number of questions he attempts correctly, is:
Options- A. 35
- B. 38
- C. 40
- D. 42 Discuss
- 6. If a3+ b3 = 341 and ab = 30, then what is the value of a + b?
Options- A. 1
- B. 9
- C. 7
- D. 11 Discuss
- 7. Common factor of 24b6c8d2, 18a6c2d4, 12a4b4 is
Options- A. 72a2b2c2d2
- B. 72a6b6c8d4
- C. 6a2b2
- D. 6 Discuss
- 8. Point P (-2, 5) is the midpoint of segment AB. Co-ordinates of A are (-5, y) and B are (x, 3). What is the value of x?
Options- A. 1
- B. -1
- C. 2
- D. -2 Discuss
- 9. Calculate the value of 61681x61681-31681x3168130000
Options- A. 93352
- B. 94362
- C. 93362
- D. 95362 Discuss
- 10. If x = 11, the value of x5 - 12x4 + 12x3 - 12x2 + 12x - 1 is
Options- A. 11
- B. 10
- C. 12
- D. -10 Discuss
Simplification problems
Search Results
Correct Answer: y^2x
Correct Answer: 1526
Correct Answer: 8010
Explanation:
(2000 + 3)(2000 + 4) - (2000 + 1)(2000 + 2) = ?
Since (2000 x 2000) - (2000 x 2000) is equal to zero. ?
= (8000 + 6000 + 12) - (4000 + 2000 + 2)
=> 14012 - 6002 = 8010.
Correct Answer: 345.428
Explanation:
43 x 616.6/100 + 37 x 217/100
=> 265.138 + 80.29
=> 345.428
Correct Answer: 38
Explanation:
Let the number of correct answers be X.
Number of incorrect answers = (60 ? X).
Therefore, 4x ? (60 ? x) = 130
=> 5x = 190 => x = 38
Correct Answer: 11
Correct Answer: 72a6b6c8d4
Correct Answer: 1
Correct Answer: 93362
Correct Answer: 10
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