Wednesday, 12 August 2015

Night Class: Quant Quiz

1. The ages of Anjali and Renu are in the ratio of 6 : 7 respectively. After 6 years, the ratio of their ages will be 15 : 17. What is the age of Renu ? (In years)
1) 28 
2) 24 
3) 32 
4) 42 
5) None of these


2. If the length and breadth of a rectangle are changed by +20% and –10% respectively. What is the % change in area of rectangle ?
1) 8% decrease 
2) 12 % increase 
3) 8 % increase 
4) 4 % increase 
5) None of these

3. Ram purchased a computer for Rs. 47000. He had to sell it for Rs. 45800. Find his loss % ?
1) 3 % 
2) 4 13/29 %
3) 2 4/9 % 
4) 2 26/47%
5) None of these

4. A can complete a piece of work in 12 days. A and B together can complete the same piece of work in 8 days. In how many days can B alone complete the same piece of work ?
1) 18 
2) 16 
3) 22 
4) 17 
5) None of these

5. The compound interest on Rs. 10000 at 20 % p.a. in 4 years is ? (In Rs)
1) Rs. 7280 
2) Rs. 10736 
3) Rs. 20736 
4) Rs. 14142 
5) None of these

6. Rs. 12000 amounts to Rs. 20736 in 3 years at r % p.a. of compound interest. What is the value of r ?
1) 20 % 
2) 12 % 
3) 25 % 
4) 18 % 
5) None of these

7. In how many different ways can the letters of the word 'MIRACLE' be arranged ?
1) 40320 
2) 5040 
3) 7080 
4) 720 
5) None of these

8. In an election between two candidates one got 72% of total valid votes. 25% of the total votes are invalid. If the total votes are 8200, what is the number of valid votes the other candidate got ?
1) 2050 
2) 1876 
3) 4324 
4) 1722 
5) None of these

9. Shweta when increases her speed from 25 km/hr to 30 km/hr. She takes one hours less than the usual time to cover a certain distance. What is the distance usually covered by Shweta ? (in km)
1) 150 km 
2) 120 km 
3) 90 km 
4) 180 km 
5) None of these

10. The sphere has the same curved surface as a cone of slant height 16 cm and base radius 4 cm. Find the radius in cm ?
1) 4 
2) 6 
3) 12 
4) 10 
5) None of these


1. 1
(6x + 6)/(7x + 6) = 15/17

2. 3
1 * b = Area
1 * 1 = 1

After changes, 1.2 * 0.9 = 1.08
There is 8% increase in the area.

3. 4
Loss% = (47000 - 45800)/47000 * 100

4. 5
Req no. of days - 1/ (1/8 - 1/12)

5. 2
Req CI = 10000 * (1.2)^4 - 10000
10000 * (2.0736 - 1)

6. 1
(20736/12000) = (1 + R/100)^3

7. 2
Required = 7P7

8. 4
No. of valid votes other candidate got = (100 - 72)/100 * (8200 - 8200*25/100)

9. 1
25 * t = 30 * (t-1) = Distance

10. 1


4 * 22/7 * r^2 = 22/7 * 4 * 16

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