Microsoft – Aptitude Questions & Answers for Placement Tests
Reviewing Previous Year Questions is a good start. Prepare Aptitude thoroughly to Clear Placement Tests with 100% Confidence.
Q.1 A group of friends decided to contribute equally to buy a gift costing $120. However, two friends backed out at the last minute. Consequently, each of the remaining friends had to contribute $3 more. How many friends were initially in the group?
Check Solution
Ans: B
Let ‘x’ be the initial number of friends. Initially, each friend was supposed to pay 120/x dollars. After two friends backed out, the remaining friends were x-2, and each had to pay 120/(x-2) dollars. We can set up the equation: 120/(x-2) = 120/x + 3. Multiplying both sides by x(x-2), we get 120x = 120(x-2) + 3x(x-2). Simplifying, we get 120x = 120x – 240 + 3x^2 – 6x. This simplifies to 3x^2 – 6x – 240 = 0, or x^2 – 2x – 80 = 0. Factoring, we get (x-10)(x+8) = 0. Since the number of friends cannot be negative, x = 10.
Q.2 What should come in place of the question mark (?) in the following number series? 7 12 22 37 57 ?
Check Solution
Ans: B
The pattern is +5, +10, +15, +20, … Therefore, the next term should be 57 + 25 = 82.
Q.3 What would be the simple interest earned on a principal of Rs. 12,000 at a rate of 8% per annum for 3 years?
Check Solution
Ans: A
Simple Interest = (Principal * Rate * Time) / 100 = (12000 * 8 * 3) / 100 = 2880
Q.4 The difference between 30% of a number and 15% of the same number is 75. What is 60% of that number?
Check Solution
Ans: A
Let the number be x. 30% of x – 15% of x = 75 => 0.30x – 0.15x = 75 => 0.15x = 75 => x = 75/0.15 = 500. Therefore, 60% of x = 0.60 * 500 = 300.
Q.5 A boat travels downstream from point A to point B in 3 hours. The return journey from B to A takes 5 hours. If the speed of the stream is 2 kmph, what is the speed of the boat in still water?
Check Solution
Ans: A
Let the speed of the boat in still water be ‘x’ kmph. Downstream speed = x + 2 kmph Upstream speed = x – 2 kmph Distance AB = (x + 2) * 3 = (x – 2) * 5 3x + 6 = 5x – 10 2x = 16 x = 8 kmph
Q.6 A student needs 35% to pass an exam. He scored 120 marks and failed by 60 marks. What is the maximum marks of the exam?
Check Solution
Ans: B
Let the maximum marks be x. The passing marks = 120 + 60 = 180 35% of x = 180 (35/100) * x = 180 x = 180 * (100/35) x = 514.28 (approximately) Closest option is 500 but the exact value is not available. Instead: Passing percentage = 35% Passing marks = 120+60 =180 180 = (35/100) * Maximum Marks Maximum marks = 180 * 100/35 Maximum marks = 514.28 Since there is no option available with 514.28, there is an error in the problem and in solution.
Q.7 The cost of 5 shirts and 7 pants is Rs 4,550/-. What is the cost of 10 shirts and 14 pants?
Check Solution
Ans: A
Notice that 10 shirts and 14 pants is exactly twice the amount of 5 shirts and 7 pants. Therefore, the cost is doubled.
Q.8 The length of a rectangular field is twice its breadth. A square field has a side equal to the breadth of the rectangle. If the perimeter of the square field is 160 meters, and the cost of ploughing the rectangular field is Rs 5 per square meter, what is the total cost of ploughing the rectangular field?
Check Solution
Ans: B
Breadth of square field = 160/4 = 40 m. Therefore, breadth of rectangle = 40 m and length = 80 m. Area of rectangle = 80 * 40 = 3200 sq m. Cost of ploughing = 3200 * 5 = Rs. 16,000/-
Q.9 If 27a – 27b = 756, what is the value of a – b?
Check Solution
Ans: B
27a – 27b = 756 => 27(a-b) = 756 => a-b = 756/27 = 28
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