Tuesday, 2 June 2026

Bank Exam Practice Material Series Page 7 | Advanced Time & Work Tricks and Efficiency Methods

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Time & Work

Efficiency Concepts

Heavy Standard Questions

Speed Tricks

Page 7 – Advanced Time & Work Tricks and Efficiency Methods

Master advanced time and work concepts, efficiency calculations, work distribution methods, and fast solving techniques for competitive examinations.

Why Time & Work is Important

Frequently asked in Bank and SSC exams
Improves logical calculation ability
Strengthens efficiency concepts
Useful in real-life planning calculations
Enhances speed and accuracy

Core Concepts Covered

Work Efficiency
Combined Work
Men and Days Problems
Work Distribution Logic
LCM Method

Important Time & Work Formulas

Work Formula

Efficiency Formula

Combined Work

Advanced Time & Work Tricks

Trick 1 – Combined Work Shortcut

A completes work in 10 days B completes work in 15 days

Combined Work:

(10 × 15) ÷ (10 + 15)

150 ÷ 25

Answer = 6 Days

Trick 2 – Efficiency Logic

If A is twice as efficient as B

Efficiency Ratio:

A : B = 2 : 1

Time Ratio:

1 : 2

Higher efficiency means lower time

Trick 3 – LCM Method

A finishes work in 12 days B finishes work in 18 days

LCM = 36

A’s efficiency = 3 units/day

B’s efficiency = 2 units/day

Combined efficiency = 5 units/day

Heavy Standard Practice Questions

Question 1

A can finish work in 20 days and B in 30 days. Find combined time.

Answer = 12 Days

Question 2

If A is 3 times as efficient as B, what is the ratio of time taken?

Answer = 1 : 3

Question 3

12 men complete work in 15 days. Find days required for 18 men.

Answer = 10 Days

Question 4

A completes work in 8 days. Find one day work.

Answer = 1/8

Fast Revision Table

Concept	Shortcut Idea
Combined Work	Use product/sum shortcut
Efficiency	Efficiency inversely proportional to time
Men & Days	Apply inverse proportion
LCM Method	Convert total work into units