UP SI MATHS QUIZ

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Question 1:

Two alloys A and B have silver and copper in the ratio 5 : 1 and 7 : 2 respectively. In what ratio should they be mixed for 80% silver in the mixture?

Question 2:

A solution contains acid and water in the ratio of $4: 5 .$ If $20 \%$ of the solution is replaced by water, then what will be the ratio of acid and water in the new solution?

Question 3:

Distribute Rs.440 among 80 students such that each boy gets Rs.6 and each girl gets Rs.4. Find the possible number of boys-

Question 4:

The ratio of milk and water in mixture of four container are $5: 4,2: 1,3: 2$ and $7: 6$ respectively. In which container is the quantity of milk relative to water is minimum.

Question 5:

A solution contains acid and water in the ratio 16 : a . When $450 \mathrm{ml}$ of this solution is mixed with 70 ml water, the ratio of acid and water becomes $4: 9$ what is the value of a?

Question 6:

Two varieties of wine with different prices is mixed in the ratio of $2: 3$. The price of first wine is Rs.20/liter and second wine is Rs. 30/liter respectively. The average price of the mixture is

Question 7:

In what ratio must a grocer mix sugar at Rs.32 per kg and Rs.38 per kg as after selling the mixture at Rs. 45 per $\mathrm{kg}$ he makes a profit of $20 \%$ ?

Question 8:

A mixture contains wine and water in the ratio 5 : 1. On adding 10 litre of water, the ratio of wine to water becomes 5 : 3. The quantity of wine in the mixture is ?

Question 9:

Two vessels A and B contain acid and water in the ratio 3 : 2 and 7 : 3, respectively. The contents of A and B are mixed in the ratio 4 : 3. What is the ratio of acid and water in the resulting solution?

Question 10:

The ratio of copper and zinc in alloy A is 5 : 7 and that in alloy B is 4 : 5. A and B are taken in the ratio of 1: 2 and mixed to form a new alloy C. What part of C is copper?