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- Question
If x varies as y and x = 8 when y = 15 then the value of x when y = 10 is:
Options- A. 5
- B. 15/8
- C. 8/15
- D. 16/3
- Correct Answer
- 16/3
Explanationx : y = 8 : 15
If y = 10, x = 8/15 X 10
y = 16/3 - 1. (798+579)2- (798-579)2798 x 579 =
Options- A. 2
- B. 6
- C. 4
- D. 8 Discuss
- 2. If a/(a+b) = 15/21, what is (a+b)/(a-b) is equal to?
Options- A. 13/9
- B. 23/11
- C. 14/5
- D. 21/9 Discuss
- 3. If a--b = 4 and ab = 45, find the value of a3 - b3
Options- A. 604
- B. 370
- C. 253
- D. 199 Discuss
- 4. The number whose square is equal to the difference of the squares of 37 and 23 is:-
Options- A. 45.09
- B. 28.98
- C. 47.09
- D. 28 Discuss
- 5. If a sum of money deposited in a bank at simple interest is doubled in 6 years, then after 12 years, the amount will be
Options- A. 5/2times the original amount
- B. 3times the original amount
- C. 7/2times the original amount
- D. 4times the original amount Discuss
- 6. The sum of two positive integers is 80 & difference between them is 20. Then what is difference of squares of those numbers ?
Options- A. 1400
- B. 1600
- C. 1800
- D. 2000 Discuss
- 7. In a school there are 1500 students, 44% of them are girls. Monthly fee of each boy is 540 and fee of each girl is 25% less than that of a boy. The sum of fees of boys & girl is
Options- A. Rs. 720600
- B. Rs. 720800
- C. Rs. 720900
- D. Rs. 721000 Discuss
- 8. Simplify the equation 0.733+0.2730.732+0.272-0.73×0.27
Options- A. 1
- B. 0.4087
- C. 0.73
- D. 0.27 Discuss
- 9. In a circle, two arcs of unequal length subtend angles in the ratio 5:3. If the smaller angle is 45° then the measure of other angle in degrees.
Options- A. 75°
- B. 72°
- C. 60°
- D. 78° Discuss
- 10. The orthocentre of an obtuseangled triangle lies
Options- A. inside the triangle
- B. outside the triangle
- C. on one side of a triangle
- D. none of these Discuss
Simplification problems
Search Results
Correct Answer: 4
Explanation:
? 4(798 X 579) / (798 X 579)
? 4
Correct Answer: 21/9
Explanation:
a/(a + b) = 15/21 ? a = 15, a + b = 21
? b = 21? 15 = 6
? a ? b =15 ? 6 = 9
? (a + b)/(a ? b) = 21/9
Correct Answer: 604
Explanation:
Correct Answer: 28.98
Explanation:
Correct Answer: 3times the original amount
Correct Answer: 1600
Correct Answer: Rs. 720900
Correct Answer: 1
Correct Answer: 75°
Correct Answer: outside the triangle
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