1. A and B each working alone can do a work in 15 days and 25 days, respectively. They started the work together but B left after some time and A finished the remaining work in 7 days. After how many days from the start did B leave? (2)
- (1) 3
- (2) 5
- (3) 7
- (4) 9
- (5)None of the above
2. A contract is to be completed in 50 days and 105 men were set to work, each working 8 h a day. After 25 days, 2/5th of the work is finished. How many additional men be employed, so that the work may be completed on time, each man now working 9 h a day? (3)
- (1) 34
- (2) 36
- (3) 35
- (4) 37
- (5) None of the above
3. The average age of 14 girls and their teacher’s age is 15 yr. If teachers age is excluded, then the average reduced by 1. What is the teacher’s age? (1)
- (1) 29 yr
- (2) 35 yr
- (3) 32 yr
- (4) 30 yr
- (5) None of the above
4. The average temperature of Delhi for four days in a particular month is 48°C. If the average temperature of second and third days is 34°C and the ratio of the temperatures of first and fourth days is 9 : 11, then find out the temperatures of first and fourth days. (3)
- (1) 45.5°C, 49.9°C
- (2) 32.4°C, 39.8°C
- (3) 43.4°C, 68.2°C
- (4) 52.4°C, 46.8°C
- (5) None of the above
5. 60 kg of an alloy A is mixed with 100 kg of alloy B. If alloy A has lead and tin in the ratio 3 : 2 and alloy B has tin and copper in the ratio 1 : 4, then the amount of tin in the new alloy is: (2)
- (1) 36 kg
- (2) 44 kg
- (3) 53 kg
- (4) 80 kg
- (5) None of the above