SBI Clerk Coaching in Chandigarh

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SAMPLE PAPERS FOR SBI CLERK EXAM BY LEEPE
TUTORIALS
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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.
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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.
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Classification of Natural Numbers
Based on divisibility there would be two types of
natural numbers. They are PRIME and COMPOSITE.
Prime Numbers
A natural number larger than unity is a prime
number if it does not have other divisors excepts
for itself and unity.
Note Unity i.e. , 1 is not a prime number.
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Properties of Prime Numbers
 
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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?
 
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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.

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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.
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To Know More About Mathematics
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