Question : The sum of the two numbers is 400. If the bigger number is decreased by 16% and the smaller number is increased by 16%, then the numbers obtained are equal. Find the smaller number.

Option 1: 168

Option 2: 152

Option 3: 144

Option 4: 170

Question : The average of 21 numbers is 60. If each number is increased by 20, then find the number by which the average is increased.

Option 1: 12

Option 2: 18

Option 3: 15

Option 4: 20

Question : Three numbers are in the ratio 2 : 5 : 7. The sum of the smallest and largest number equals the sum of the second number and 16. What is the smallest number?

Option 1: 8

Option 2: 12

Option 3: 6

Option 4: 10

Question : A number is increased by 20% and then the increased number is decreased by 20%. The net increase or decrease is:

Option 1: Decrease 2%

Option 2: Increase 4%

Option 3: Increase 2%

Option 4: Decrease 4%

Question : A number is increased by 30% and then the increased number is decreased by 30%. The net increase or decrease is:

Option 1: 12% increase

Option 2: 9% decrease

Option 3: 15% decrease

Option 4: 30% increase

Question : The difference between the two numbers is 45% of their sum. The ratio of the larger number to the smaller number is:

Option 1: 20 : 9

Option 2: 9 : 20

Option 3: 29 : 11

Option 4: 11 : 29