SSC CHSL, RRB PREVIOUS YEAR (2020) Aptitude (Ratio & Proportion) || Competitive Mathematics tricks Ratio and Proportion

 SSCCHSL, RRB PREVIOUS YEAR (2020)   Aptitude (Ratio & Proportion) || Competitive Mathematics tricks Ratio and Proportion.

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1. In two types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21, respectively. In what proportion should the two types be mixed, so that the ratio of chromium to steel in the mixed type become 7 : 32 ?

A) 1 : 2
B) 1 : 3
C) 2 : 3
D) 3 : 4

... Answer is A)
1 : 2 "

 

2. A Sum of ₹ 6100 was divided among 8 men, 10 women and 12 children in such a way that each man received 25% more than a woman and each woman received 25% more than a child. How much did each woman receive ?

A) ₹ 203.68
B) ₹ 206.08
C) ₹ 206.68
D) ₹ 201.68

... Answer is B)
₹ 206.08 "

 

3. The Cost of making an article is divided between materials, labour and overheads in the ratio 3 : 4 : 1. If the material cost is ₹ 22.50, find the cost of the article ?

A) ₹ 60
B) ₹ 80
C) ₹ 100
D) ₹ 40

... Answer is A)
₹ 60 "

 

4. What number should be added or subtracted from each term of the ratio 17 : 24, so that it becomes equal to 1 : 2 ?

A) 12
B) 11
C) 10
D) 13

... Answer is C)
10 "

 

5. If the annual income of A, B and C are in The ratio 1 : 3 : 7 and the total annual income of A and C is ₹ 800000, then the monthly salary of B (in ₹) is

A) ₹ 20000
B) ₹ 25000
C) ₹ 30000
D) ₹ 15009

... Answer is B)
₹ 25000 "

 

6. The ratio of alcohol and water in 40L of mixture is 5 : 3. 8L of the mixture is removed and replaced with water. Now the ratio of the alcohol and water in the resultant mixture is

A) 1 : 2
B) 1 : 1
C) 2 : 1
D) 1 : 3

... Answer is B)
1 : 1 "

 

 

7. If a : b : c = 3 : 4 : 7, then the ratio (a + b +c ) : c is equal to

A) 2 :1
B) 14 : 3
C) 7 : 2
D) 1 : 2

... Answer is A)
2 : 1"

 

8.  On selling 17 balls at ₹ 720 there is a loss equal to the cost price of 5 balls. The cost price of a ball is

A) ₹ 45
B) ₹ 50
C) ₹ 60
D) ₹ 55

... Answer is C)
₹ 60 "

 

9. If a : b : c = 2 : 3 : 4 and 2a _ 3b + 4c = 33, then the value of c is

A) 6
B) 9
C) 12
D) 66/7

... Answer is C)
12 "

 

10. The speeds of A and B are in the ratio 3 : 4. A takes 20 min more than B to reach a destination. In what time does A reach the destination ?

A) 1⅓ h
B) 2 h
C) 2⅔ h
D) 1½ h

... Answer is A)
1⅓"

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