The number system is one of the most fundamental subjects in the quantitative aptitude section of the Bank of Baroda Office Assistant 2025 Examination. It creates building blocks to solve various arithmetic and algebraic problems that often appear in bank examinations. A strong grip on the number system concepts not only helps to answer direct questions, but also strengthens your overall calculation speed and accuracy in other subjects such as simplification, adjacent and data interpretation.
Number system for Bank of Baroda Office Assistant 2025
The quantitative qualification section tests your numerical logic and the ability to efficiently resolve medium-level arithmetic questions. The number system is a frequent component of this section, and questions are usually easier to moderate in difficulty. Since the Bob Office Assistant Recruitment 2025 Exam is aimed at the minimum 10th pass candidate, the question concept of number system is concept and formula-based, which are perfect for scoring with little practice.
Major topics covered under number system
Here are the main concepts that candidates should cover while preparing the number system:
- Type of number
- Divisive rules
- LCM and HCF
- Prime factorization
- Remaining theorem
- Keep price and inscribed value
- Number chain
1. Types of numbers
Natural Number: Counting number starting from 1 (ie, 1, 2, 3,…).
whole numbers: Natural numbers including 0 (ie, 0, 1, 2,…).
Integer: All positive and negative complete number including zero (… -2, -1, 0, 1, 2,…).
rational numbers: The number that can be written as a fraction (eg, 3/4, -2, 0.5).
irrational numbers: With non-dacoing decimal (eg, π2, π), which numbers cannot be expressed as parts.
Prime numbers: More than 1 number with only two factors – 1 and self (eg, 2, 3, 5, 7).
Overall Number: Number with more than two factors (eg, 4, 6, 8).
Even more odd numbers: Even the number 2 (eg, 2, 4, 6) are divisible, and there are no odd numbers (eg, 1, 3, 5).
2. Division of division
These are shortcuts to check if a number is divisible by another without real division.
For example, a number is divisible by 2. If its final digit is problem, then if the sum of its digits is divisible by 3, then from 5 to 5 if it ends in 0 or 5, and so on.
These rules help quickly identify factors during the examination and simplify the calculation stages.
3. LCM and HCF
LCM (at least normal multiple) is the smallest number that is many of the two or more numbers.
HCF (highest general factor) is the largest number that divides two or more numbers absolutely.
They are often used in problems related to time intervals, groups and frequent events.
4. Prime factors
This involves expressing a number as a product of its major factors.
It is used to find LCM, HCF and simple fractions.
Example: 60 = 2 × 2 × 3 × 5 = 2 = × 3 × 5.
5. Remaining theorem
These rules help to find the remains when dividing a large number of long divisions.
Use of modular arithmetic and remaining properties (eg, (a + b) modes n = concepts like model [(a mod n) + (b mod n)] MOD n) usually apply.
6. Location value and inscribed value
The location value refers to the value of a digit depending on its position in a number (eg, in 456, 5 is location value).
The inscribed value is the point, regardless of its position (eg, 5 in 456 is 5).
7. Number chain
While considered a separate subject, identifying the patterns in the number chain often depends on the number system concepts such as primes, squares or qualities.
Tips to prepare for number system
Clean your basics: Start with the definition of different types of numbers and practice examples from each category.
Practice partition test: They save time in elimination and factor-based questions.
Remember the prime numbers up to 100: This speeds up problems, especially in factor and LCM/HCF problems.
Create a sutra sheet: Keep a handwritten note of major formulas and rules for quick amendment.
Solve chapter-wise quiz: Try daily quiz on number systems to manufacture speed and accuracy.
Mock Test and previous papers: Analyze the Bob Office Assistant Papers last year to understand the question pattern.
Common mistakes to avoid number system
- All numbers are considered positive: Some questions may include negative or zero; read carefully.
- Cudging location value with inscribed value: Remember, the marked value is the points; Location value digit × is its position value.
- Ignoring the remaining qualities: Often, candidates estimate the remains without applying the correct theorem or simplification.
