ABOUT THIS COURSE

  1. Introduction
  2. Euclid’s Division Lemma
  3. The Fundamental Theorem of Arithmetic
  4. Revisiting Irrational Numbers
  5. Revisiting Rational Numbers and Their Decimal Expansions
  6. Summary

Maths ( Real Numbers )

Duration: 120 Minutes | Course Code: 1127

Rs. 12

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Chapter – 1 Real number

The Simplest Way to Learn Real numbers!

What is the real number?

      •      Real number is a value that represents a quantity along a line.

      •      Real number consists of all rational and irrational numbers.

      •      The sub sets of real numbers are:
 

    1.      Natural number

    2.      Whole number

    3.       Integers

§  Natural number - The set of counting numbers, which is also a subset of real no. (N= 1, 2, 3, 4)

§  Whole number - The set of natural numbers including zero. (W=0, 1, 2, 3, 4)

§  Integers - The set of natural numbers, their negatives and zero. (Z=-2, -1, 0, 1, 2)

The ScoreXTM offers the study material inclusive of solutions for CBSE class 10 maths chapter 1 to attain the complete knowledge of the chapter.

What is the format of the course?

Our course of CBSE class 10 math chapter 1 is designed to make the concepts simpler to learn and cover all the main topics. Some are:-

Euclid’s Division Lemma

         If we have two positive integers a and b, then there exist unique integers q and r which satisfies the condition a=bq + r where 0

         Now, to calculate the Highest Common Factor (HCF) of two positive integers a and b, we use Euclid’s division algorithm.

Rational Numbers

The rational number is also known as a ratio. That means it can be written as a fraction, for example, 456/100= 4.56, 64/8=8

Irrational Numbers

All numbers that are not rational are considered irrational numbers. Irrational numbers are non-repeating digits that don’t end to the right of the decimal point. For example:-

2.55 is irrational number

400 is not an irrational number

If you want to practice and become confident on the topic, get the course now for desired results.

  1. Q.No 1 - A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

    12 days

    15 days

    16 days

    18 days

    1/10  Next
  2. Q.No 2 - The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

    0

    1

    10

    19

  3. Q.No 3 - Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?

    1/3

    1/8

    2/8

    1/16

  4. Q.No 4 - Find the wrong number in the following series. 3252 , 3080 , 2958 , 2876 , 2826

    3080

    2876

    2826

    3252

    None

  5. Q.No 5 - The angle of elevation of the sun, when the length of the shadow of a tree 3 times the height of the tree, is

    30º

    45º

    60º

    90º

    None

  6. Q.No 6 - 22, 42, 64, 88, ?

    114

    112

    116

    110

    None

  7. Q.No 7 - 2442 , 1222 , 614 , 312 ,163 , 90 , 55.75 Look at series carefully and find the wrong number

    1222

    312

    90

    614

    None of the above

  8. Q.No 8 - Look carefully for the pattern, and then choose which pair of numbers comes next 42, 40, 38, 35, 33, 31, 28

    25, 22

    26,23

    26, 24

    26,22

    None

  9. Q.No 9 - 5, 50, 45, 450, 445, ?, 4445

    4450

    4600

    4550

    4500

    None of the above

  10. Q.No 10 - During World War I Germany was defeated in the Battle of Verdun on the western front and Romania declared war on the eastern front in the year

    1914 AD

    1915 AD

    1916 AD

    1917 AD

    None of the above

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