Good Methods Flashcards
Five years from now Sunaina’s age will be 4 of Aarti’s age that time. If the respective ratio between Sunaina’s age five years ago and Aarti’s age that time was 2: 3.
What Arti’s present age ? (in years)
1)35 2) 20 3) 40 4) 30 5) 25
5 years from now ratio of S:A is 3:4
5 years before S:A is 2:3
Therefore, Present age of A + 5 will be 4 multiple and
Present age of A-5 will be 3 multiple
By option verification 35 will be the answer.
There was 75 litres of pure milk in a vessel. 24% of the milk was taken out and replaced with equal quantity of water. Then 20 litres of the mixture of milk and water was taken out. After this 5 litres of milk and 10 litres of water were added to the mixture. What is the respective ratio of water and milk in the final mixture?
1) 56:117
2) 64:117
3) 58:119
4) 52:119
5) 58: 117
Final mixture volume will be 70 litres.
So the ratio sum should be of 7 multiple because there is no place to eliminate 7 in the given question.
The bowling average of Ellyse perry was 20. She decreases her bowling average by 5. When she takes all the 10 wickets for 30 runs in his last match, then find the number of wickets taken by her before the last match?
1) 21 2) 24 3) 25 4) 35 5) 28
By allegation
20—15—3
| |
12 5
12:5=> 24:10
•24
A shopkeeper marks all his goods such that he can get a profit of 60% even after giving a discount of 20%. If on a certain day, the shopkeeper had to sell his goods to a customer at a 30% discount instead of the usual discount, then find the profit or loss?
1) 20% loss 2) 40% loss 3) 20% profit 4) 40% profit 5) 60%profit
SP = 80MP=160CP
CP/MP=80/160
Let CP=80
MP=160
30% MP=48
SP =112
Profit =32=40% of CP
We can change Subject and Predicate only in ___ and ___ type conclusions.
Some and No type conclusions
- 8men and 10women working together can do a piece of work in 5 days. If 4men and 20women working together can do the same work in 4 days, then find how many days 12men and 5women together can do twice the work?
1) 15 2) 18 3) 16 4) 14 5) 10 - The average speed of Boat M and Boat N in still water is 9kmph. Boat M can cover 51km upstream in 10.2hours while Boat N can cover 41km upstream in 41hours, and then find the time taken by Boat N to cover a distance of 104km downstream? 1) 5 2) 8 3) 6 4) 16 5) 7
- A Bus starts running late by 30 minutes so the driver increases its speed by 18 kmph to reach the destination on the scheduled time. If the distance between the source and destination of the bus is 180km, then find the original speed of the bus?
1) 90 2) 78 3) 76 4) 72 5) 74 - Chandana gets a certain amount of salary invested in scheme A offering 14% compound interest for two years compound annually. The interest earned by her is Rs.31518 less than the amount invested by her, then find how much amount
was invested by Chandana?
1) 45000 2) 81000 3) 63000 4) 36000 5) 27000 - A shirt is marked up by 40% and then some discount is offered on it such that there is a profit of 30%. If the marked price had been Rs.65 more, then the discount price that had to be given will be the thrice, then find the cost price of
the shirt?
1) 350 2) 325 3) 330 4) 360 5) 335 - The average weight of a class of some students increased by 1.5kg if a student whose weight is 56kg joined the class and the average weight increased by 2kg if two students whose average weight is 51kg respectively joined the class, then
find how many the number of students in the class initially?
1) 9 2) 7 3) 6 4) 8 5) 11 - A vessel contains 600L of a mixture of grape juice and milk in the ratio of 7:X respectively. A person added 30 liters of milk to it, the ratio of milk to Grape juice
resultant mixture becomes 4:5, and then find the value of X?
1) 5 2) 7 3) 3 4) 8 5) 9 - The respective ratio between the cost price of articles A and B is 2:3. If the marked price of both articles A and B is 25% and 20% above the cost price respectively.If the difference between the marked prices of both articles is Rs.220.
Then find the cost price of article A?
1) 230 2)210 3) 225 4)400 5)200 - The diameter of the Hemisphere is 50 % of the side of the square. The perimeter
of the square is 112, then find the volume of the hemisphere? (pie=3)
1)679 2)686 3) 656
4) 646
5) 672
72.5 73.2 74.4 75.1 76.2 77.5 78.1 79.4 80.2
How to know when to draw a table or Venn diagram for a caselet for an at least or at most problems?
- Draw Venn diagram if they mention any one of the outside value of the diagram.
- Draw table if they mention only inside of the table.
The number of laddus to be distributed among a certain number of people increases in the ratio 25 : 38 while the number of persons decreases in the ratio 36 : 25. Find the original number of laddus to be distributed if the presently distributed
laddus are 6650?
1) 6200 2) 6400 3) 6100 4) 6300 5) 6900
4
(2536/(3825))*6650
A person covers a 180 km journey in two parts. The first part he travelled in a Bullet bike and the remaining journey he covers in scooty. If the rent of a Bullet bike is Rs.15 per km and for scooty, it is Rs.8 per km. If he paid total rent of Rs.1860, then find the distance travelled by scooty?
1) 120 2) 140 3) 100 4) 130 5) 190
1
We can do it in both reverse method and allegation
A and B started a business with an investment in the ratio of 3:4 and the ratio of the investment period of A and B is X: 9. At the end of the business, the profit share of A is 1600 less than B and the total profit share of the business is Rs. 8000, then find the value of the X?
1) 10 2) 4 3) 6 4) 8 5) 5
(4)
A+B=8000
A-B=1600
Solve from this step
The ratio of the present ages of A and B is 13:14. After 6 years the respective ratio of their ages will be 29:31, then find the sum of their ages after 3 years from now?
1) 128 2) 116 3) 114 4) 168 5) 126
(3)
Answer - 6 should be 27 multiple
- Present average age of 3 friends Moeen ali, Rayudu and Shivam is 30 years. 4 years hence from now, ratio of ages of Moeen ali and Shivam will be 13:22, respectively. Present age of Rayudu is 12 years less than that of Shivam. Find the present age of Rayudu?
1) 32 2) 24 3) 28
4) 44 5) 40
(3)
Answer plus 16 should be 22 multiple
Mixture S containing only milk and water in the ratio of 9:7, respectively, is mixed with 152 litres of mixture K, in which quantities of milk and water were in the ratio of 8:11, respectively, such that quantity of water in the resultant mixture is 4 litres less than that of milk. Find the initial quantity of mixture S? (in liters)
1) 192 2) 224 3) 240 4) 230 5) 228
152 is 19 parts
1 part is 8
Difference is 3 parts =>24
So the mixture should have 28 to match the given resultant .
Therefore 2 parts 28
1 part 14
16 parts 16*14=224
One-day Bhargavi reaches her school from her home 12 minutes early at 10km/ hr speed and next time by reducing her speed to 6 km/hr she reached 20 minutes
late. What would be the speed of Bhargavi if she reaches in time?
1) 9km/hr 2) 6km/hr 3) 8km/hr 4) 7km/hr 5)7.5 km/hr
(3)
Speed Ratio= 5:3
Time Ratio= 3:5
2 parts= 32 minutes
For 10km/hr it takes 163 minutes
For 6 km/hr it takes 165 minutes
Distance = 10163/60=8 km
Exact time period will be= 48+12= 60 min or =80-20 = 60 min
Therefore, Speed=8/60*60= 8 km/hr
