What is 3/4 + 2/3?
- A. 5/7
- B. 1 5/12
- C. 1 1/6
- D. 17/24
Show answer and explanation
Answer: B. 1 5/12 Use the common denominator 12: 9/12 + 8/12 = 17/12, which is 1 5/12. Adding numerators and denominators straight across (5/7) is the classic trap.
Subprofessional · CSE-PPT
Numerical Ability in the CSE Subprofessional exam
Numerical Ability tests practical arithmetic and problem solving without a calculator. CSC prohibits calculators of any kind at the examinee's seat, so speed with fractions, decimals, and percent matters as much as knowing the formulas. Practice with original study items, not CSC exam questions.
3 topics · 383 questions
- Questions
- 383
- Topics
- 3
- Mock items
- 145
- 1,900+ original items
- Worked explanation on every item
- Prepaid · no auto-renew
- Independent — not CSC
- Built for mobile 4G
Drill by topic
3 Numerical Ability topics
383 published questions in this category. Sign in to start a topic drill.
- 01
131
Basic operations
Add, subtract, multiply, divide. No calculator on exam day.
published questions
Practice →
- 02
Number sequence
Find the next number or the rule that holds the series together.
95 questions
Practice →
- 03
Word problems
Turn a short story into the computation the question asks for.
157 questions
Practice →
Subprofessional coverage · English
What Subprofessional Numerical Ability covers
Fluency with the four operations, number patterns, and turning a word problem into an equation you can solve by hand. See the full Subprofessional coverage.
Basic operations
Fractions, decimals, percent, ratio and proportion, exponents, and order of operations (PEMDAS/MDAS).
Free basic operations reviewer →Number sequence
Finding the next or missing term in arithmetic, geometric, alternating, and mixed-rule series.
Free number sequence reviewer →Word problems
Age, work, distance–rate–time, mixture, percent increase/decrease, discount, simple interest, and averages.
Free word problems reviewer →
Numerical Ability tips
- Memorize common fraction–decimal–percent pairs (1/8 = 0.125 = 12.5%) to skip long division.
- For sequences, check the differences first, then ratios, then alternating terms.
- In word problems, write the unknown as a variable before you compute anything.
- Estimate first — on a multiple-choice item, a rough answer often eliminates two options.
Common traps
- Confusing percent change with percentage points.
- Adding work rates incorrectly (add the fractions of the job per hour, not the hours).
- Copying a correct answer to the wrong oval on the answer sheet.
Try it free
Numerical Ability sample questions
Answer first, then open the explanation. Original items, not actual CSC exam questions.
What is 0.25 × 48 ÷ 0.5?
- A. 6
- B. 12
- C. 24
- D. 96
Show answer and explanation
Answer: C. 24 Work left to right: 0.25 × 48 = 12, then 12 ÷ 0.5 = 24. Dividing by 0.5 is the same as multiplying by 2.
The loop
Diagnose, drill this category, sit a mock.
Use Numerical Ability drills for the topics that leak points. Full mocks still follow the complete Subprofessional format.
01
Diagnose
Free ~40-item timed mock. Topic map before any signup.
02
Drill
Open a topic in Numerical Ability. Worked method on every item.
03
Sit a mock
Subprofessional length, server timer, resume. Half mocks skip EDQ.
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Common questions
About Numerical Ability
Affiliation, category-only practice, and whether you need an account — answered plainly.
Numerical Ability tests practical arithmetic and problem solving without a calculator. CSC prohibits calculators of any kind at the examinee's seat, so speed with fractions, decimals, and percent matters as much as knowing the formulas.
Fluency with the four operations, number patterns, and turning a word problem into an equation you can solve by hand. Topics: Basic operations, Number sequence, Word problems.
145 scored items plus 20 unscored EDQ items, in 2 hours 40 minutes. CSC does not publish an official item count per subject, so our mock split by subject is an estimate.
Our free Numerical Ability sample questions page has 8 original items with answers and explanations, no signup needed.
No. These are original practice items for study. CSC does not publish official item banks for commercial reuse. We cannot promise the same questions will appear on exam day.
Yes — pick a topic, difficulty, and session length in Practice by Category. Full mocks still follow the complete Subprofessional format.
The free diagnostic needs no signup. Topic drills and saving a plan require a free account. A prepaid pass unlocks the full practice loop.
Ready to drill Numerical Ability?
Start category practice, or take the free diagnostic first for a topic map across every subtest.
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