Balochistan Revenue Authority (BRA) Assistant / Inspector Mathematics: Percentages MCQs

Balochistan Revenue Authority (BRA) Assistant / Inspector Mathematics: Percentages MCQs — sample questions

1. Question 1

   Q1. The length and breadth of a rectangle are increased by 30% and 20% respectively from the side length of an original square. By what percent does the area of the new rectangle exceed the area of the square?

   • A) 56%
   • B) 46%
   • C) 65%
   • D) 26%

   Answer: 56%

   Explanation: New area = 1.30 × 1.20 = 1.56 times the original square's area, so the increase is 56%.

2. Question 2

   Q2. A school has four classes. They have 10, 20, 30 and 40 students respectively. Students' pass percentage is 20%, 30%, 60% and 100%. What is the pass percentage of the entire school?

   • A) 46%
   • B) 66%
   • C) 86%
   • D) None of these

   Answer: 66%

   Explanation: The correct value is 66%. Apply the formula or arithmetic step shown in the question and

3. Question 3

   Q3. When 20% of itself is added to a number, it gives 102. Find the number.

   • A) 85
   • B) 90
   • C) 75
   • D) 185

   Answer: 85

   Explanation: x + 0.20x = 102 → 1.20x = 102 → x = 85.

4. Question 4

   Q4. If the side of a square is increased by 25 % then how much percent does it's area get increased:

   • A) 125%
   • B) 156.25%
   • C) 50%
   • D) 56.25%

   Answer: 56.25%

   Explanation: New side = 1.25s; new area = 1.5625s²; percentage increase = 56.25%.

5. Question 5

   Q5. 40% of Raees's marks is equal to 20% of Rahim's marks, and this is also equal to 30% of Rehman's marks. If Rehman's marks are 80, find the average marks of Raees and Rahim.

   • A) 60
   • B) 70
   • C) 80
   • D) 90

   Answer: 90

   Explanation: 30% of Rehman (80) = 24; Raees = 24/0.40 = 60; Rahim = 24/0.20 = 120; average = (60+120)/2 = 90.