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- Question
What approximate value should come in place of the question mark (?) in the following equation (Note: You are not expected to calculate the exact value)? [(7.99)2?(13.001)2+(4.01)3]2=?
Options- A. -1800
- B. 1450
- C. -1660
- D. 1660
- Correct Answer
- 1660
Explanation[(7.99)^2?(13.001)^2+(4.01)^3]^2= X X= [8^2-13^2+4^3]^2 X= [64-169+64]^2 X= [-41]^2 X=1681
- 1. What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.) 21.003 × 39.998 ?209.91 = 126× ?
Options- A. 5
- B. 4
- C. 3
- D. 2 Discuss
- 2. What is the simplified value of 1-sin A1+sin A ?
Options- A. tan A
- B. sec A
- C. sec A + tan A
- D. sec A ? tan A Discuss
- 3. What is the simplified value of (1? sin A cos A)(sin A + cos A)?
Options- A. sin2A ? cos2A
- B. sin3A + cos3A
- C. 0
- D. 1 Discuss
- 4. If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?
Options- A. x+9
- B. x2+96x
- C. x2+186x
- D. 0 Discuss
- 5. What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?
Options- A. ?a
- B. 1/?a
- C. 0
- D. ?a+1 Discuss
- 6. In the given questions, two equations numbered I and II are given. Solve both the equation and mark the appropriate answer. I. x2?5x ?24 = 0II. 2y2+ 19y + 35 = 0
Options- A. x > y
- B. x>y
- C. x < y
- D. x
Correct Answer:
Explanation:
x^2?5x ?24 = 0
(x-8) (x+3)
x = 8, -3
II. 2y^2+ 19y + 35 = 0
(2y+7) (y+7)y= -7, -5/2
So can?t be determined
- 7. For what value of k, the expression x6? 18x3 + k will be a perfect square?
Options- A. -9
- B. 81
- C. 9
- D. -81 Discuss
- 8. If 5+x+5-x5+x-5-x = 3 ,then what is the value of x ?
Options- A. 5/2
- B. 25/3
- C. 4
- D. 3 Discuss
- 9. If x = 4aba+b , then what is the value of x+2ax-2a+x+2bx-2b ?
Options- A. 0
- B. 2
- C. 4
- D. 1 Discuss
- 10. In a triangle PQR, ?Q = 90°. If PQ = 12 cm and QR = 5 cm, then what is the radius (in cm) of the circum circle of the triangle?
Options- A. 5
- B. 6
- C. 6.5
- D. 6?2 Discuss
Simplification problems
Search Results
Correct Answer: 5
Explanation:
Take nearest values21.003 × 39.998 ?209.91 = 126× ?630 = 126× ?? = 5 (approx)
Correct Answer: sec A ? tan A
Correct Answer: sin3A + cos3A
Correct Answer: x2+96x
Correct Answer: ?a
Correct Answer: 81
Correct Answer: 3
Correct Answer: 2
Correct Answer: 6.5
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