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Practice Questions
Note: You can add tough questions into your favourite list for second revision. 
In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1: 2 : 3. If there are Rs. 30 in all, how many 5 p coins are there ?  
A.  50 [Wrong Answer] 
B.  100 [Correct Answer] 
C.  150 [Wrong Answer] 
D.  200 [Wrong Answer] 
View Answer
Explanation:
Answer : B Discuss it below :Let the number of 25 p, 10 p and 5 p coins be x, 2x and 3x respectively. Then, sum of their values ^{100} ^{100} ^{100} = Rs. Ajay Kumar Said on 20160804 08:47:36 Answer which is explained here is wrong. Click here for more comments 
Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats ?  
A.  2 : 3 : 4 [Correct Answer] 
B.  6 : 7 : 8 [Wrong Answer] 
C.  6 : 8 : 9 [Wrong Answer] 
D.  None of these [Wrong Answer] 
View Answer

If 40% of a number is equal to twothird of another number, what is the ratio of first number to the second number ?  
A.  2 : 5 [Wrong Answer] 
B.  3 : 7 [Wrong Answer] 
C.  5 : 3 [Correct Answer] 
D.  7 : 3 [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below : Sahil Said on 20161115 05:51:03 40% of x = 2/3 x 40/100 X x = 2/3 x 2/5 x = 2/3 x ('x' on both sides gets cancelled) 2/5 = 2/3 5/2 = 3/2 5:2 Click here for more comments 
Find the fourth proportion to 3, 7 and 9.  
A.  63 [Wrong Answer] 
B.  31 [Wrong Answer] 
C.  21 [Correct Answer] 
D.  27 [Wrong Answer] 
View Answer

A:B=2:3, B:C=3:4, A:D=4:5. Find C:D.  
A.  2:5 [Wrong Answer] 
B.  4:5 [Wrong Answer] 
C.  6:5 [Wrong Answer] 
D.  8:5 [Correct Answer] 
View Answer
Explanation:
Answer : D Discuss it below :A:C=(A:B)*(B:C) =(2/3)*(3/4)= 1/2 C:D=(C:A)*(A:D) =(2)*(4/5) = 8:5 Click here for more comments 
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