Bank Exam Speed Maths Master Series Page 4 | Cubes Tricks & Fast Cube Calculation Methods

 

 Bank Exam Speed Maths Master Series – Page 4

Cubes Tricks & Fast Cube Calculation Methods

Shaktimatha Learning – Speed Maths Academy
Learn cube tricks, shortcut formulas, and fast cube calculation methods to improve speed and accuracy for Bank Exams, SSC, Railways, Insurance, and Competitive Exams.

 Importance of Cubes in Competitive Exams

Cubes are very important in:

• Simplification
• Approximation
• Number Series
• Quantitative Aptitude
• Data Interpretation

Fast cube calculations improve:

• Speed
• Accuracy
• Mental calculation ability

🎯 Why Learn Cube Tricks?

Students who memorize cubes and cube shortcuts can solve aptitude questions quickly.

 Example:

Instead of multiplying:
23 × 23 × 23

Use cube methods.

✅ Faster Solution

 Important Cubes to Memorize

Number	Cube
1³	1
2³	8
3³	27
4³	64
5³	125
6³	216
7³	343
8³	512
9³	729
10³	1000

 Basic Cube Formula

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This formula helps calculate cubes quickly.

🔥 Trick 1: Cube of Numbers Ending in 5

Example: 15³

15 × 15 × 15

15² = 225
225 × 15 = 3375

✅ Answer = 3375

 Trick 2: Cube Near 100

1

Example: 101³

Difference from 100 = 1

101³ = 1030301

✅ Answer = 1030301

Example: 99³

Difference from 100 = 1

99³ = 970299

✅ Answer = 970299

 Trick 3: Cube Pattern Observation

Unit Digit	Cube Ends With
1	1
2	8
3	7
4	4
5	5
6	6
7	3
8	2
9	9

 Cube Root Shortcut

Example: Find cube root of 2744

Step 1 → Last digit = 4
Cube root last digit = 4

Step 2 → Nearest cube below 2744 = 1000

Cube root = 10+

✅ Answer = 14

Because: 14³ = 2744

Fast Cube Memorization

Number	Cube
11	1331
12	1728
13	2197
14	2744
15	3375
16	4096
17	4913
18	5832
19	6859
20	8000

Important Cube Tricks

Topic	Shortcut
Cube Formula	Expansion Method
Cube Root	Unit Digit Pattern
Near 100	Base Method
Memorization	Daily Revision

 Practice Questions

1. 12³ = ?
2. 14³ = ?
3. 18³ = ?
4. Cube root of 3375 = ?
5. Cube root of 4913 = ?

✅ Answers

1. 1728
2. 2744
3. 5832
4. 15
5. 17

🎯 Preparation Strategy:
Practice cubes, cube roots, unit digit patterns, and formula expansion daily to improve simplification speed, approximation solving, and mental calculation ability.

“Quick Calculations are Built Through Smart Tricks & Consistent Practice.”

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Bank Exam Speed Maths Master Series