Sharpen your problem-solving skills with 10 easy aptitude questions modeled after the most repeated and previous year TCS NQT questions for the 2025 batch. This quiz covers percentage, time, ratio, logical reasoning, and basic arithmetic concepts popularly seen in recent TCS NQT exams to help candidates prepare effectively.
If 20% of (P + Q) is equal to 25% of (P − Q), what percentage of P is Q?
Explanation: Let’s translate the condition: 20% of (P + Q) = 25% of (P − Q). Changing percentages to fractions, (1/5)(P + Q) = (1/4)(P − Q). Solving leads to Q = 0.45P or 45% of P. The other answers do not fit the problem setup. 60% and 90% are common distractors when percentage changes are misunderstood, and 25% is a misplacement of the constant.
A sum of ₹5,000 is invested at 8% per annum simple interest for 2 years. What is the total interest earned after 2 years?
Explanation: Simple interest is principal × rate × time ÷ 100. So, 5000 × 8 × 2 / 100 = ₹800. ₹600 and ₹500 mistakenly use either wrong interest rates or duration, while ₹900 is an overestimate because it’s not a compound calculation.
A person covers 360 kilometers at a speed of 60 km/h. How many hours does the journey take?
Explanation: Time = Distance ÷ Speed = 360 ÷ 60 = 6 hours. ‘8 hours’ might be picked if multiplying instead of dividing, ‘10 hours’ results from using 36 instead of 360, and ‘5 hours’ from misreading the numbers.
Find the next number in this series: 5, 10, 20, 40, __?
Explanation: Each number is doubled from the previous (5 × 2 = 10, 10 × 2 = 20, etc.), so the next is 40 × 2 = 80. ‘60’ may come from adding 20 instead of doubling, ‘100’ from adding incorrectly, and ‘55’ from random miscalculation.
The ratio of boys to girls in a class is 3:2. If there are 30 boys, how many girls are there?
Explanation: Given 3x = 30, so x = 10. Therefore, girls = 2x = 20. Choosing 15 and 18 shows a misunderstanding of ratios, while 45 assumes total students instead of girls alone.
The average of 8, 12, 15, and 25 is:
Explanation: Add the numbers (8+12+15+25=60), divide by 4: 60 ÷ 4 = 15. Picking ‘14’ or ‘12’ implies a mistake in summing or dividing the data, while ‘18’ is an overestimate.
A person walks 4 km east, then turns right and walks 3 km south. How far is the person from the starting point?
Explanation: Use the Pythagorean theorem: sqrt(4² + 3²) = sqrt(16+9) = sqrt(25) = 5 km. ‘7 km’ comes from adding the distances, ‘6 km’ assumes incorrect calculation, and ‘1 km’ is a misplacement.
Select the odd one out: Triangle, Square, Rectangle, Cube.
Explanation: Cube is a 3-dimensional figure while the others are 2-dimensional shapes. Picking Triangle or Rectangle overlooks the dimensional distinction, and Square is also a 2D shape.
What is the probability of getting a head when flipping a fair coin once?
Explanation: A coin has two equal outcomes: head or tail. Probability is 1 out of 2, or 1/2. ‘1/4’ and ‘1/3’ are incorrect as they suggest more options or biased coins, and ‘2’ is outside the valid probability range.
If a basket has 25 apples and 7 are taken out, how many apples remain in the basket?
Explanation: Subtract: 25 - 7 = 18 apples. ‘15’ or ‘20’ may come from other arithmetic errors, while ‘12’ is a significant miscalculation not supported by the data.