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- Question
The difference of 18 and its reciprocal is equal to :
Options- A. 1/8
- B. 4/3
- C. 15/16
- D. 105/304
- Correct Answer
- 105/304
ExplanationRequired difference = 19/16 - 16/19 = 105/304..
- 1. 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
- 2. If a * b = 2a - 3b + ab, then 3 * 5 + 5 * 3 is equal to :
Options- A. 22
- B. 23
- C. 24
- D. 25 Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. Simplify the following equation. 1943 + 12 + 13 + 11 + 14
Options- A. 43/19
- B. 1
- C. 38/19
- D. None of these Discuss
- 9. In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets Rs. 2.40 per hour for regular work and Rs. 3.20 per hours for overtime. If he earns Rs. 432 in 4 weeks, then how many hours does he work for ?
Options- A. 160
- B. 175
- C. 180
- D. 195 Discuss
- 10. How many 18 ' s are there in 3712 ?
Options- A. 300
- B. 400
- C. 500
- D. 600 Discuss
Simplification problems
Search Results
Correct Answer: 50
Explanation:
Correct Answer: 22
Explanation:
3 * 5 + 5 * 3 = (2 * 3 - 3 * 5 + 3 * 5) + ( 2 * 5 - 3 * 3 + 5 * 3)
= (6 + 10 - 9 + 15) = 22.
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: 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.
Correct Answer: 175
Explanation:
Suppose the man works overtime for x hours.
Now, working hours in 4 weeks = (5 x 8 x 4) = 160.
Therefore, 160 * 2.40 + x * 3.20 = 432
=> 3.20x = 432 - 384 = 48
=> x = 15.
Hence, total hours of work = (160 + 15) = 175.
Correct Answer: 300
Explanation:
Required number = = 75 x 4 = 300
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