Question : A man ordered 4 pairs of black socks and some pairs of brown socks. The price of a pair of black socks is double that of a brown pair. While preparing the bill the clerk interchanged the number of black and brown pairs by mistake which increased the bill by 50%. The ratio of the number of black and brown pairs of socks in the original order was:

Option 1: 2 : 1

Option 2: 1 : 4

Option 3: 1 : 2

Option 4: 4 : 1

Question : A dozen pairs of socks quoted at Rs. 80 are available at a discount of 10%. How many pairs of socks can be bought for Rs. 24?

Option 1: 4

Option 2: 5

Option 3: 3

Option 4: 6

Question : A number is first decreased by 28% and then increased by 28%. The number so obtained is 784 less than the original number. Find the value of the original number.

Option 1: 1000

Option 2: 15000

Option 3: 10000

Option 4: 1500

Question : A number is first increased by 10% and then increased by 20%. The number, so obtained, is now decreased by 12%. What is the net increase or decrease percent in the original number?

Option 1: 16.16% increase

Option 2: 14.14% decrease

Option 3: 11.11% decrease

Option 4: 12.12% increase

Question : The length of a rectangle is increased by 10% and breadth is decreased by 10%. The area of the new rectangle is:

Option 1: neither increased nor decreased.

Option 2: increased by 1%.

Option 3: decreased by 2%.

Option 4: decreased by 1%.

Question : If the numerator of a fraction is increased by 60% and the denominator is increased by 40%, then the resultant fraction is $\frac{16}{63}$. The original fraction is:

Option 1: $\frac{5}{9}$

Option 2: $\frac{2}{9}$

Option 3: $\frac{2}{11}$

Option 4: $\frac{4}{9}$