SAMPLE PAPERS FOR SBI CLERK EXAM BY LEEPE TUTORIALS

MATHEMATICS

Mathematics is an important section of SBI clerk exam. Today we will discuss about the basics of math. This will help you a lot. Everyone

knows how to solve a question but what matters is your Speed and

Accuracy. And for that you should know the basics of Maths.

Introduction to Number Systems

Natural Numbers:

All positive integers are natural numbers.

Example: 1,2,3,4,8………

There are infinite natural numbers and number 1 is the

least natural number.

Classification of Natural Numbers

Prime Numbers:

A natural number larger than unity is a prime number if it does

not have other divisors excepts for itself and unity.

Based on divisibility there would be two types of natural

numbers. They are PRIME and COMPOSITE.

Note: Unity i.e. , 1 is not a prime number.

Properties of Prime Numbers

Process to Check a Number is Prime or not

• Take the square root of the number.

• Round of the square root to the next highest integer call this

number as Z. Check for divisibility of the number N by all

prime number below Z. If there is no numbers below the

value of Z which divides N then number will be prime.

Example 239 is prime number or not?

Composite Numbers

The number which are not prime are know

as composite numbers.

Co- Primes:

Two number a and b are said to be co-primes, if their H.C.F is 1

Example (2,3), (4,5), (7,9), (8,11)…….

Place value or Local value of a digit in a Number.

Place Value

Example 689745132

Place value of 2 is (2x1) = 2

Place value of 3 is (3x10) = 30 and so on.

Face Value

It is the value of the digit itself at whatever place it may be.

Example 689745132

face value of 2 is 2

Place value of 3 is 3 and so on.

To Know More About Mathematics

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