Start learning →

UIIC AO Quantitative Aptitude — practice by topic

Browse 118 questions across 12 Quantitative Aptitude topics. Choose what you want to revise, then open a question to check its answer and worked solution.

Start learning UIIC AO with Quill →

Quantitative Aptitude topics

Simple Interest (50)Percentages (34)Compound Interest (32)Ages (29)Boats and Streams (29)Interest (29)Partnership (29)Pipes and Cisterns (29)Shortcuts (29)Simple & Compound Interest (27)Time, Speed and Distance (11)Data Interpretation (10)

Try a Quantitative Aptitude question

If a number is increased by 40% and then decreased by 25%, what is the net percentage change?Read the answer and worked solution →In a town the population grew from 24,000 to 30,000. By what percent did the population increase?Read the answer and worked solution →A is 40% more than B. By what percent is B less than A?Read the answer and worked solution →If 30% of x equals 60% of 80, find x.Read the answer and worked solution →

Worked practice questions

If a number is increased by 40% and then decreased by 25%, what is the net percentage change?

  1. +5%
  2. +10%
  3. +15%
  4. −5%
Show answer and solution

Correct answer: A. +5%

1. Let original = 100. 2. After +40%: 100 × 1.40 = 140. 3. After −25%: 140 × 0.75 = 105. 4. Net change = (105 − 100)/100 = +5%. _Source: jkchrome Percentage QB, p.1 — successive change pattern_

Open this question →

In a town the population grew from 24,000 to 30,000. By what percent did the population increase?

  1. 20%
  2. 25%
  3. 30%
  4. 15%
Show answer and solution

Correct answer: B. 25%

1. Increase = 30,000 − 24,000 = 6,000. 2. % increase = 6,000 / 24,000 × 100. 3. = 25%. _Source: jkchrome Percentage QB, p.1 — basic % increase_

Open this question →

A is 40% more than B. By what percent is B less than A?

  1. 28.57%
  2. 33.33%
  3. 40%
  4. 60%
Show answer and solution

Correct answer: A. 28.57%

1. Let B = 100, then A = 140. 2. B is less than A by (140 − 100) = 40. 3. As a percent of A: 40 / 140 × 100 = 28.57%. _Source: jkchrome Percentage QB, p.1 — reciprocal % pattern_

Open this question →

How to practise

  1. Choose a Quantitative Aptitude question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.