# Orders of Magnitude UPSC Questions

## Orders of Magnitude MCQ Questions

1.

In a rare coin collection, there is one gold coin for every three non-gold coins. 10 more gold coins are added to the collection and the ratio of gold coins to non-gold coins would be 1:2 Based on the information, the total number of coins in the collection now becomes

UPSC-2013

A.

90

B.

80

C.

60

D.

50

A. 90

2.

Out of 120 applications for a post, 70 are male and 80 have a driver's license. What is the ratio between the minimum to maximum number of males having driver's license?

UPSC-2013

A.

1 to 2

B.

2 to 3

C.

3 to 7

D.

5 to 7

C. 3 to 7

3.

There are two containers X and Y. X contains 100 ml of milk and Y contains 100 ml of water. 20 ml of milk from X is transferred to Y. After mixing well, 20 ml of the mixture in Y is transferred back to X. If m denotes the proportion of milk in X and n denotes the proportion of water in Y, then which one of the following is correct?

UPSC-2022

A.

m=n

B.

m>n

C.

m<n

D.

Cannot be determined due to insufficient data

A. m=n

4.

The monthly incomes of X and Y are in the ratio of 4:3 and their monthly expenses are in the ratio of 3:2. However, each saves â‚¹ 6, 000 per month. What is their total monthly income?

UPSC-2017

A.

â‚¹ 28, 000

B.

â‚¹ 42, 000

C.

â‚¹ 56, 000

D.

â‚¹ 84, 000

B. â‚¹ 42, 000

5.

Two glasses of equal volume are respectively half and three-fourths filled with milk. They are then filled to the brim by adding water. Their contents are then poured into another vessel. What will be the ratio of milk to water in this vessel?

UPSC-2012

A.

1:3

B.

2:3

C.

3:2

D.

5:3

D. 5:3

6.

There is a milk sample with 50% water in it. If 1/3rd of this milk is added to equal amount of pure milk, then water in the new mixture will fall down to

UPSC-2017

A.

25%

B.

30%

C.

35%

D.

40%