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- Question
If a * b = 2a - 3b + ab, then 3 * 5 + 5 * 3 is equal to :
Options- A. 22
- B. 23
- C. 24
- D. 25
- Correct Answer
- 22
Explanation3 * 5 + 5 * 3 = (2 * 3 - 3 * 5 + 3 * 5) + ( 2 * 5 - 3 * 3 + 5 * 3)
= (6 + 10 - 9 + 15) = 22.
- 1. A fires 5 shots to B's 3 but A kills only once in 3 shots while B kills once in 2 shots. When B has missed 27 times, A has killed :
Options- A. 30 birds
- B. 60 birds
- C. 72 birds
- D. 90 birds Discuss
- 2. If 2 tables and 3 chairs cost Rs, 3500 and 3 tables and 2 chairs cost Rs. 4000, then how much does a table cost ?
Options- A. 500
- B. 1000
- C. 1500
- D. 2000 Discuss
- 3. In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 60 questions and secures 130 marks, the no of questions he attempts correctly is :
Options- A. 35
- B. 38
- C. 40
- D. 42 Discuss
- 4. Dev lent Rs. 8000 to Jairam for 17 years and Rs. 4700 to Karnik for 16 years on simple interest at the same rate of interest and received Rs. 21120 in all from both of them as interest. The rate of interest per annum is:
Options- A. 10.5 percent
- B. 10 percent
- C. 11 percent
- D. 11.5 percent Discuss
- 5. A sum fetched a total simple interest of Rs. 9648 at the rate of 12% per year in 6 years. What is the sum?
Options- A. Rs 16080
- B. Rs 10720
- C. Rs 8040
- D. Rs 13400 Discuss
- 6. If a + b + c = 13, a2+b2+c2=69 then find the ab + bc + ca :
Options- A. 10
- B. 30
- C. 50
- D. 70 Discuss
- 7. The difference of 18 and its reciprocal is equal to :
Options- A. 1/8
- B. 4/3
- C. 15/16
- D. 105/304 Discuss
- 8. To fill a tank, 25 buckets of water is required. How many buckets of water will be required to fill the same tank if the capacity of bucket is reduced to two-fifth of its present ?
Options- A. 52.5
- B. 62.5
- C. 72.5
- D. 82.5 Discuss
- 9. A tank is 2/5 full. If 16 litres of water is added to the tank, it becomes 6/7 full. The capacity of the tank is:
Options- A. 28 litres
- B. 32 litres
- C. 35 litres
- D. 42 litres Discuss
- 10. Simplify the following equation. 1943 + 12 + 13 + 11 + 14
Options- A. 43/19
- B. 1
- C. 38/19
- D. None of these Discuss
Simplification problems
Search Results
Correct Answer: 30 birds
Explanation:
Let the no of shots be x. Then,
Shots fired by A =(5/8)x
Shots fired by B = (3/8)x
Killing shots by A = 1/3 of (5/8)x = (5/24)x
Shots missed by B = 1/2 of (3/8)x = (3/16)x
(3/16)x = 27 x =144
Birds killed by A = (5/24)x = (5/24)*144 = 30
Correct Answer: 1000
Explanation:
Let the cost of a table and that of a chair be Rs. x and Rs, y respectively.
Then, 2x + 3y = 3500 ...(i)
and 3x + 2y = 4000 .....(ii)
solving (i) and (ii) we get x = 1000, y = 500
Correct Answer: 38
Explanation:
Let the number of correct answers be X.
Number of incorrect answers = (60 ? X).
4x ? (60 ? x) = 130
=> 5x = 190
=> x = 38
Correct Answer: 10 percent
Correct Answer: Rs 13400
Correct Answer: 50
Explanation:
Correct Answer: 105/304
Explanation:
Required difference = 19/16 - 16/19 = 105/304..
Correct Answer: 62.5
Correct Answer: 35 litres
Explanation:
Let the capacity of the tank be x litres.
Then, (6x/7 - 2x/5) = 16 <=> 30x - 14x = 16*35 <=> x = 35
Correct Answer: None of these
Explanation:
After solving we get,
62/931.
None of the options satisfy.
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