ব্যাংক জব নিয়োগ পরীক্ষা গণিত Number

ব্যাংক জব নিয়োগ পরীক্ষা গণিত Number

Important Concepts and Formulas – Numbers

Number Sets and Properties of Numbers

Rational numbers can be expressed as ab where a and b are integers and b≠0
Examples: 112, 42, 0, −811 etc.

Rational numbers can be expressed as a/b where a and b are integers and where a and b are integers and b≠0

Examples:4/11,2/5,0

All integers, fractions and terminating or recurring decimals are rational numbers.

e.    Irrational Numbers

Any number which is not a rational number is an irrational number. In other words, an irrational number is a number which cannot be expressed as a/b where a and b are integers.

Example :π,√2

We cannot π as a simple fraction (The fraction 22/7 = 3.14…. is just an approximate value ofππ)

f)   Real Numbers

Real numbers include counting numbers, whole numbers, integers, rational numbers and irrational numbers.

Addition, Subtraction and Multiplication Rules for Even and Odd Numbers

Addition Rules for Even and Odd Numbers

• • The sum of any number of even numbers is always even

• • The sum of even number of odd numbers is always even

• The sum of odd number of odd numbers is always odd

Subtraction Rules for Even and Odd Numbers

• • The difference of two even numbers is always even

• The difference of two odd numbers is always even

Multiplication Rules for Even and Odd Numbers

• • The product of even numbers is always even

• • The product of odd numbers is always odd

• If there is at least one even number multiplied by any number of odd numbers, the product is always even

  এই লেকচারের পরের পেইজে যেতে নিচের …. তে ক্লিক কর।

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  October 14, 2016 | 8 years আগে

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