UP POLICE CONSTABLE MATHS QUIZ-9

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Question 1:

The ratio of acid to water in solutions A and B is 2 : 7 and 4 : 5, respectively: these solutions are mixed in the ratio of 4 : 3. What is the ratio of acid to water in the resulting solution?

Question 2:

When x is subtracted from each of 24, 33, 20 and 26, the number so obtained in this order are in proportion. What is the mean proportional between (2x + 1) and (5x – 11)?

Question 3:

The ratio between the length and breadth of a rectangular field is $5: 4$. If the breadth is 20 metres less than the length, the perimeter of the field is:

Question 4:

The speed of $A$ is $20 \mathrm{~km} / \mathrm{h}$ more than the speed of $B$. The time that A takes to travel a distance of $300 \mathrm{~km}$ is 2 hours less than the time that B takes to travel a distance of $240 \mathrm{~km}$. What is the speed (in $\mathrm{km} / \mathrm{h}$ ) of A?

Question 5:

Charlie and Lola together can do a piece of work in 20 days. They worked for 15 days, then Lola left the job. Charlie finished the remaining work in 12 days. Find in how many days Charlie alone can complete the work?

Question 6:

$80 \div[48-\{56-(60-36 \div 12 \times 4)\}]=?$

Question 7:

When an article is sold for Rs. 640, there is a loss of 12%. To gain 21% it should be sold for:

Question 8:

The number of boys and girls in a college are in the ratio of 3 : 2. If 20% of the boys and 25% of the girls are adults, then what percentage of the students are not adults?

Question 9:

The L.C.M of two numbers is 48 . The numbers are in the ratio $2: 3 .$. The sum of the numbers is 

Question 10:

A man bought 13 articles at Rs. 70 each, 15 at Rs. 60 each and 12 at Rs. 65 each. The average price per article is