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Quantitative Drill: 25 Questions in 30 Minutes

35 minintermediateModule 2: Quantitative ReasoningContinues from hat-interest
35 min · Module 2: Quantitative Reasoning · Timed drill

Why This Matters

This is the first training session rather than a teaching session. Reading about percentages does not make you faster at percentages; doing twenty-five mixed questions against a clock does. Mixed practice is deliberately harder than blocked practice, because in the real paper nothing tells you which technique to use — recognising the type is the skill.

Run this drill properly once, then again a week later, and compare the two scores. The gap between them is your learning rate, and it is the most honest feedback this course can give you.

The Protocol

  1. 30 minutes, no calculator, no pausing. Set a timer you can see. Write answers as a,b,c,d on paper.
  2. Answer all 25. There is no negative marking; a blank is a zero you chose.
  3. Stop at 30 minutes even if unfinished, and mark where you were: that number is your pacing data.
  4. Self-mark using the key below, writing the cause of every miss in one line.
  5. Retake the same set in 7 days. Target: 22 or more correct inside 30 minutes.

The budget is 72 seconds per question, matching the real paper. If you finish early, spend the remaining time on the questions you flagged rather than stopping.

Or take it timed, here in the browser

Everything below is the same paper with the same answer key. The runner adds the clock, marks your answers, explains every miss, and keeps your result so the retake in seven days can be compared against this one. Nothing is sent anywhere; the score stays in this browser.

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The Paper

  1. Q1. What is 15% of 240?
    (a) 24    (b) 36    (c) 45    (d) 16
  2. Q2. A price rises from Rs 80 to Rs 100. What is the percentage increase?
    (a) 20%    (b) 25%    (c) 80%    (d) 12.5%
  3. Q3. Divide Rs 180 in the ratio 2 : 3 : 4. What is the largest share?
    (a) Rs 40    (b) Rs 60    (c) Rs 80    (d) Rs 90
  4. Q4. Three workers finish a job in 12 days. How long will four workers take at the same rate?
    (a) 8 days    (b) 9 days    (c) 16 days    (d) 48 days
  5. Q5. Solve for x: 3x + 7 = 22.
    (a) 3    (b) 5    (c) 15    (d) 9.67
  6. Q6. What is the area of a triangle with base 10 cm and height 6 cm?
    (a) 30 cm²    (b) 60 cm²    (c) 16 cm²    (d) 80 cm²
  7. Q7. What is the mean of 4, 8, 10 and 14?
    (a) 8    (b) 9    (c) 12    (d) 36
  8. Q8. A fair six-sided die is rolled once. What is the probability of an even number?
    (a) 1/6    (b) 1/3    (c) 1/2    (d) 2/3
  9. Q9. What is the HCF of 84 and 126?
    (a) 21    (b) 42    (c) 252    (d) 10,584
  10. Q10. What is the units digit of 235?
    (a) 2    (b) 4    (c) 6    (d) 8
  11. Q11. Which fraction is larger, 7/12 or 11/19?
    (a) 7/12    (b) 11/19    (c) they are equal    (d) cannot be determined
  12. Q12. The mean of 12 numbers is 15. If the number 27 is removed, what is the new mean?
    (a) 13.9    (b) 12.75    (c) 14.5    (d) 15
  13. Q13. A train 120 m long travels at 54 km/h. How long does it take to cross a platform 180 m long?
    (a) 8 s    (b) 12 s    (c) 20 s    (d) 30 s
  14. Q14. A boat covers 12 km downstream in 1 hour and the same distance upstream in 2 hours. What is its speed in still water?
    (a) 3 km/h    (b) 6 km/h    (c) 9 km/h    (d) 12 km/h
  15. Q15. A can do a job in 12 days and B in 18 days. Working together, how long will they take?
    (a) 6 days    (b) 7.2 days    (c) 15 days    (d) 30 days
  16. Q16. An inlet pipe fills a tank in 6 hours and a drain empties it in 9 hours. With both open, how long does the tank take to fill?
    (a) 3 h    (b) 7.2 h    (c) 15 h    (d) 18 h
  17. Q17. Twelve workers complete a job in 15 days. How long would nine workers take at the same rate?
    (a) 11.25 days    (b) 16.5 days    (c) 20 days    (d) 28 days
  18. Q18. Two fair dice are rolled. What is the probability that the sum is 8?
    (a) 1/6    (b) 1/9    (c) 5/36    (d) 4/36
  19. Q19. A bag holds 4 red and 6 blue balls. Two are drawn without replacement. What is the probability that both are red?
    (a) 4/25    (b) 2/15    (c) 1/5    (d) 3/10
  20. Q20. A value falls by 20% and then rises by 20%. Compared with its starting value it is:
    (a) unchanged    (b) 4% lower    (c) 4% higher    (d) 2% lower
  21. Q21. Enrolment rises from 300 to 350 students. What is the percentage increase?
    (a) 14.3%    (b) 16.7%    (c) 25%    (d) 50%
  22. Q22. What is the simple interest on Rs 5,000 at 8% per year for 2 years?
    (a) Rs 400    (b) Rs 800    (c) Rs 1,000    (d) Rs 5,800
  23. Q23. A car covers 150 km in 2 hours 30 minutes. What is its average speed?
    (a) 55 km/h    (b) 60 km/h    (c) 75 km/h    (d) 100 km/h
  24. Q24. A cyclist covers the first half of a journey at 10 km/h and the second half at 15 km/h. What is the average speed for the whole journey?
    (a) 12 km/h    (b) 12.5 km/h    (c) 13 km/h    (d) 25 km/h
  25. Q25. In how many ways can a committee of 3 be chosen from 7 people?
    (a) 21    (b) 35    (c) 210    (d) 343

Answer Key and Solutions

Mark honestly, then read the solution for every question you missed and for every question you guessed. The trap column names the wrong answer you were probably choosing.

QTopicAnswerSolutionExpected trap
1Percentages(b) 3610% is 24 and 5% is 12, so 15% is 36(a) 24, the 10% value
2Percentage change(b) 25%Change 20 divided by original 80(a) 20%, dividing by the new value
3Ratio(c) 80Parts total 9, one part is 20, largest is 4 parts(d) 90, halving the total
4Inverse proportion(b) 9 days36 worker-days over 4 workers(c) 16, treating it as direct proportion
5Algebra(b) 53x = 15, so x = 5(c) 15, stopping before dividing
6Geometry(a) 30 cm²One half of 10 × 6(b) 60, forgetting the half
7Statistics(b) 9Sum 36 over 4 values(d) 36, quoting the sum
8Probability(c) 1/2Three even faces out of six(b) 1/3, counting only 2 and 4
9Number properties(b) 4284 = 2²×3×7 and 126 = 2×3²×7, so HCF = 2×3×7(c) 252 is the LCM, (d) 10,584 the product
10Number properties(d) 8The cycle 2, 4, 8, 6 has length 4 and 35 leaves remainder 3(a) 2, using the exponent directly
11Fractions(a) 7/127 × 19 = 133 against 11 × 12 = 132(b) 11/19, chosen from the larger numerator
12Averages(a) 13.9Total 180 minus 27 is 153 over 11 values(b) 12.75, dividing by 12 instead of 11
13Speed(c) 20 s54 km/h is 15 m/s; 120 + 180 = 300 m(b) 12 s, ignoring the train's own length
14Boats(c) 9 km/hDownstream 12, upstream 6, so still water is their average(a) 3 km/h, which is the current
15Work(b) 7.2 days1/12 + 1/18 = 5/36, so the time is 36/5(c) 15, averaging the two times
16Pipes(d) 18 h1/6 − 1/9 = 1/18(c) 15, adding the times instead of subtracting rates
17Worker-days(c) 20 days180 worker-days over 9 workers(a) 11.25, treating it as direct proportion
18Probability(c) 5/36Five pairs: (2,6), (3,5), (4,4), (5,3), (6,2)(a) 1/6, forgetting that only one pair is a double
19Probability(b) 2/15(4/10) × (3/9) = 12/90(a) 4/25, drawing with replacement
20Successive change(b) 4% lower100 becomes 80, then 96, because the rise is on a smaller base(a) unchanged
21Data interpretation(b) 16.7%50 divided by the original 300(a) 14.3%, dividing by the new total
22Interest(b) Rs 8005,000 × 8% × 2 years(a) Rs 400, one year only
23Speed(b) 60 km/h2 h 30 min is 2.5 hours(c) 75 km/h, dividing by 2 hours
24Average speed(a) 12 km/hEqual distances give 2ab ÷ (a + b) = 300 ÷ 25(b) 12.5, the plain mean of 10 and 15
25Counting(b) 357 × 6 × 5 ÷ 3! = 210 ÷ 6(c) 210, ordering the committee

Read Your Score

Score in 30 minWhat it meansNext action
22-25On track for a strong quantitative sectionMove to the verbal block; retake this set in a week to confirm
18-21Solid, with two or three technique gapsReturn to the lessons behind the topics you missed twice
14-17Knowledge present, speed or precision lackingRedo the missed questions, then repeat timed sets of 25 every other day
Below 14Fundamentals need rebuildingWork the quantitative lessons in order, then retake this set cold

If you did not finish inside 30 minutes, treat the unfinished count as the headline result: pacing, not knowledge, is then your first repair job.

Log the Result

This set has questions to be done in 30 minutes, and a pass mark of or better. The paper's per-question budget is seconds, and the retake goes in the calendar days from today.

Apply It

You scored 19/25 and finished with two questions untouched. Your misses were Q12, Q15, Q16 and Q24. Write the repair plan for the next three days.

Show the reasoning

The four misses are not four separate topics. Q15, Q16 and Q24 are all the same idea seen three ways — combining rates that do not behave like simple averages — and Q12 is the total form of the mean. So the repair is two lessons, not four review sessions: Averages and Weighted Means and Work, Pipes and Rates, plus Speed, Distance and Time for the harmonic-mean case.

Day 1: reread those three lessons and redo their Try It quizzes until every option's explanation is obvious. Day 2: redo only questions 12, 15, 16 and 24 from this paper, from scratch, with the clock running. Day 3: a fresh timed set of 25 questions, and compare the finish position — the two untouched questions say the real problem was pace on the rate questions, so the target is to finish all 25 with two minutes unused.

Write the plan as actions with dates, not as intentions: what you will do, on which day, and how you will know it worked.

Connect

Quantitative is drilled. The next module changes subject completely: verbal reasoning, 30 marks of rules about words — and the fastest marks on the paper to convert because a rule learned once is right every time.