Practice IBA Mathematics questions with answers and explanations.
Choose an option to check your answer.
Profit equals selling price minus cost price.
Thus, 920 - 800 = Rs. 120.
Choose an option to check your answer.
The weighted sum is 70 × 2 + 90 × 3 = 410.
Dividing by the total weight 5 gives 82.
Choose an option to check your answer.
A 10% loss on Rs. 1,200 is Rs. 120.
Subtracting gives a selling price of Rs. 1,080.
Choose an option to check your answer.
The total score is 20 × 60 + 30 × 70 = 3,300.
Dividing by 50 students gives 66.
Choose an option to check your answer.
The total ratio parts are 7, so one part is 35/7 = 5 liters.
Water is two parts, or 10 liters.
Choose an option to check your answer.
Thirty percent of 20 liters is 0.30 × 20.
This equals 6 liters.
Choose an option to check your answer.
The solution contains 4 liters of salt, which remains unchanged.
For salt to be 25%, total volume must be 16 liters, so 6 liters are added.
Choose an option to check your answer.
For direct variation, x/y is constant.
The constant is 18/6 = 3, so x = 3 × 10 = 30.
Choose an option to check your answer.
The greatest common divisor of 24 and 36 is 12.
Dividing both terms by 12 gives 2:3.
Choose an option to check your answer.
Three ratio parts correspond to 24, so one part is 8.
Girls represent five parts, giving 5 × 8 = 40.
Choose an option to check your answer.
The total number of ratio parts is 9, so one part is 720/9 = 80.
The largest share is 4 × 80 = Rs. 320.
Choose an option to check your answer.
Make the common term b equal in both ratios.
Multiplying 4:7 by 2 gives 8:14, so a:b:c = 8:14:15.
