Bank Exam Speed Maths
Page 1: Number System (Shortcut Methods)
1. Types of Numbers
Natural Numbers: 1, 2, 3...
Whole Numbers: 0, 1, 2...
Integers: -2, -1, 0, 1, 2...
Even Numbers: Divisible by 2
Odd Numbers: Not divisible by 2
Prime Numbers: Numbers having only 2 factors
Shortcut Tip: Except 2, all prime numbers are odd.
2. Divisibility Rules
2 → Last digit is even
3 → Sum of digits divisible by 3
4 → Last 2 digits divisible by 4
5 → Ends with 0 or 5
6 → Divisible by both 2 and 3
8 → Last 3 digits divisible by 8
9 → Sum of digits divisible by 9
10 → Ends with 0
11 → Difference of alternate digits
3. Important Shortcut Tricks
Divisibility by 11:
(Sum of odd place digits – Sum of even place digits)
(Sum of odd place digits – Sum of even place digits)
Example: 121 → (1 + 1) – 2 = 0 → Divisible ✔
Divisibility by 3 & 9:
Add digits and check
Add digits and check
Example: 738 → 7+3+8 = 18 → Divisible ✔
4. Unit Digit Tricks
2 → 2,4,8,6 (repeat)
3 → 3,9,7,1
4 → 4,6
5 → Always 5
6 → Always 6
7 → 7,9,3,1
8 → 8,4,2,6
9 → 9,1
Example: 7⁴ → Answer = 1
5. Practice Questions
1. Is 456 divisible by 9?
2. Is 121 divisible by 11?
3. Is 640 divisible by 4?
4. Find unit digit of 3⁵
5. Is 728 divisible by 8?
Bank Exam Speed Maths – Complete Course
All Quant Topics + Reasoning Quizzes in One Place
About This Course:
This complete course is designed for IBPS, SBI, SSC and other competitive exams.
Learn all quantitative aptitude topics with shortcut tricks, practice questions,
and reasoning quizzes.
Quantitative Aptitude Topics
Practice Daily to Improve Speed & Accuracy
Consistency + Smart Practice = Selection
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