Multiple Choice QuestionsThe ratio of numbers of boys to the number of girls in a school of 432 pupils is 5 : 4. When some new boys and girls are admitted, the number of boys increase by 12 and the ratio of the boys to girls changes to 7 : 6. The number of new girls admitted is
12
14
24
24
If the three numbers in the ratio 3:2:5 be such that the sum of the squares is equal to 1862 then which number is the middle one?
16
14
13
13
Two bottles contain acid and water in the ratio 2 : 3 and 1 : 2 respectively. These are mixed in the ratio 1 : 3. What is the ratio of acid and water in the new mixture?
7 : 13
11 : 57
23 : 37
23 : 37
The ratio of the number of boys and girls in a school is 3:2. If 20% of the boys and 25% of the girls are scholarship holders, the percentage of the school students who are not scholarship holders is
56
78
70
70
In two types of brass, the ratios of Copper to Zinc are 8:3 and 15:7 respectively. If the two types of brass be melted and mixed in the ratio 5:2 a new type of brass is obtained. The ratio of Copper to Zinc in this new type of brass is
3 : 2
2 : 3
3 : 4
3 : 4
An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is
70 seconds
50 seconds
40 seconds
40 seconds
A and B have their annual average income Rs. 80,000. B and C have their annual average income Rs. 75,000. C and A have their annual average income Rs. 78,000.The annual income of A is?
Rs. 81000
Rs. 82000
Rs. 83000
Rs. 83000
A car travels from A to B with 40 Km/h and returns from B to A with 60 Km/h. Its average speed during the whole journey is
48 km/h
50 km/h
45 km/h
45 km/h
In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 runs
6.4
6.3
6.25
6.25
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