Solve with Darj

Solve with Darj Stop being afraid of Math and start solving. 💡

Making math simple, clear, and solvable.

Discover step-by-step solutions, smart shortcuts, and effective problem-solving techniques designed to help you understand Math with confidence.

04/08/2026

📝 CSE Review No. 9 | Mixture Problem: Alcohol Solution 🧪

"How many liters of a 20% alcohol solution must be mixed with 10 liters of a 50% alcohol solution to produce a 30% alcohol solution?" 🤔

This is a CLASSIC Civil Service Exam question type — and once you learn the formula, you'll never miss one again! ✅

📌 Step-by-step solution shown on video
📌 Perfect for Numerical Reasoning practice
📌 Save this for your daily CSE review 💪

Which topic should we solve next? Comment below! 👇

30/07/2026

Two people, two different speeds – can you guess the answer before I write a single number?

Civil Service Exam Review

Number 8

29/07/2026

Civil Service Exam Review

Number 7

28/07/2026

Civil Service Exam Review

Number 6 Part 7

28/07/2026

Civil Service Exam Review

Number 6 Part 6

28/07/2026

Civil Service Exam Review

Number 6 Part 5

28/07/2026

Civil Service Exam Review

Number 6 Part 4

28/07/2026

Civil Service Exam Review

Number 6 Part 3

28/07/2026

Civil Service Exam Review

Number 6 Part 2

28/07/2026

Civil Service Exam Review

Number 6 Part 1

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