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Short Definition of Mathematics

Notation: Writing a number in figures is called notation. Numeration: Writing a number in words is called numeration. Numeral: A group of digits, denoting a number is called a numeral. i.e., 4628, 76590, 803742 etc.are numerals . Factor: A number, which divides the divident completely leaving no remainder, is known as the number 's Factor of the number. Multiple: A dividend into which a factor can divide is called the Multiple of that number.               30÷5=6 Here,30 is a multiple of 6. Even Numbers: All multiples of 2 are called even numbers.  Odd Numbers: Numbers which are not multiples of 2 are called odd numbers. Prime Numbers: Each of the numbers which have exactly two factors, namely 1 and itself, is called a prime number. Example: The numbers 2,3,5,7,11,13.........,etc. are prime numbers. Composite Numbers: Numbers having more than two factors are known as composite numbers. Example: The numbers 4,6,8,9,10,12,14.........., etc. are co...
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Revision notes class 9th S.st (Geography) Ch:3 Drainage

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                  Drainage                   Chapter 3 ✳️Introduction 💢The area drained by a single river system is called a drainage basin. 💢A closer observation on a map will indicate that any elevated area, such as a mountain or an upland, separates two drainage basins. Such as upland is known as a water divide.                   Water Divide ✳️Drainage Systems In India 💢The drainage systems of India are mainly controlled by the broad relief features of the subcontinent. ✴️The Indian rivers are divided into two major groups: ✳️: The Himalayan rivers  ✳️:The Peninsular rivers 💢The two major physiographic regions of India, the Himalayan and the Peninsular rivers are different from each other in many ways. 💢Most of the Himalayan rivers are perennial. 💢The two major Himalayan rivers, the Indus and the Brahmaputra originate from the ...
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Revision notes class 9th S.st (Economics) Ch:2

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                  Chapter: 2           People as Resource 🔅Population of a nation can be its asset rather than liability. 🔅Population becomes human capital when there is investment made in the form of education, training and medical care. 🔅'People as resource' is a way of referring to a country's working people in terms of their existing productive skills and abilities. 🔅When existing human resource is developed by becoming educated and healthy it turns into human capital. 🔅Human capital is superior to other resources like land and physical capital, as it uses these capitals and adds value to them. 🔅Investment in human capital (through education, training, medical care) can give high returns in the future. Country like Japan have invested a lot in human resources. They do not have  rich natural resource, but still they are called developed nations. 🔅Human beings perform many activities which can be grouped...
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Revision notes class 9th S.st (Economics)Ch:1

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The Story Of Village Palampur                   Chapter :1 🔆 Introduction 🔅Palampur is a hypothetical village which is well -connected with neighbouring villages and towns. 🔅Raiganj a big village, is 3 kilometres from Palampur. 🔅The village is well connected by the road and most of the houses are electrified. 🔅This village has about 450 families belonging to several different castes. The 80 upper caste families on the majority of land in the village. 🔅The SCs (Dalits) comprise one third of the population and live in one corner of the village and in much smaller houses some of which are of mud and straw.           Scene of a village 🔅It has two primary schools and one High school. 🔅There is a primary health centre run by the government and one private dispensary where the sick are treated. 🔅farming is the man production activity in the village Palampur. Most of the people are dependent on farming f...
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Revision notes class 9th S.st (Geography) Ch:2

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    Physical features of India                   Chapter: 2 🔆 Introduction   🔅India has all major physical features of the earth , i.e. mountains , plains , deserts , plateaus and Islands. 🔅In India the soil colour varies from place to place as it is formed from different types of rocks. 🔅India is a large land mass formed during different geological periods. 🔅India's relief features are outcome of other processes like weathering , erosion and deposition. 🔅India has varied physical features whose formation can be explained on the basis of the 'Theory of Plate Tectonics'. 🔅According to the theory of Plate Tectonics the 7 major and minor plates that form the earth's crust keep moving , causing stress and thus leading to folding , faulting and volcanic activity. 🔅Plates can have convergent ,divergent and transform boundaries. 🔅India's Peninsular part is made from one of the oldest landmass of the world's 'Gondw...
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Revision notes class 9th S.ST (Geography)ch:1

        India size and location                   Chapter:1 🔅India is an ancient civilization but now it is a developing nation .It has shown remarkable progress in various fields. 🔅 Location   🔅India lies entirely in the Northern hemisphere. 🔅India's mainland extends between 8 degree 4'N and 37 degree 8'N latitudes ,and 68 degree 7'E and 97 degree 25'E longitudes. 🔅The Tropic of Cancer (23 degree 30'N)divides India into two almost equal parts. 🔅The island groups of Lakshadweep and Andaman and Nicobar are also part of India. 🔅 Size 🔅Covering an area of 3.28 million square kilometres, India's total area is 2.4 % of the total geographical area of the world. 🔅India is the world's seventh largest country with a land boundary of about 15,200 km ,with total length of the coastline being 7,516.6 km. 🔅India's East -West extent appears to be smaller than the north-south extent. 🔅India latitudinal and longitudinal ex...
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समान्य ज्ञान

                भारत में प्रथम 1) भारतीय गवर्नर जनरल? उत्तर) .सी राजगोपालाचारी (जून 1948 से 25 जनवरी 1950) 2) राष्ट्रपति? उत्तर )डॉ .राजेंद्र प्रसाद 3) उपराष्ट्रपति? उत्तर)डॉ .एस राधाकृष्णन 4) मुस्लिम राष्ट्रपति? उत्तर )डॉ .जाकिर हुसैन ( 1967 से 1969 तक) 5) लोकसभा अध्यक्ष ? उत्तर) जी.वी. मावलंकर ( 1952 से 1956 तक) 6) प्रधानमंत्री ,विदेशमंत्री ? उत्तर ) जवाहरलाल नेहरू  7) उप प्रधानमंत्री? उत्तर )सरदार वल्लभभाई पटेल     8) विधि ( कानून )मंत्री ? उत्तर )डॉ .बी .आर . अंबेडकर 9) शिक्षा मंत्री ?  उत्तर) अबुल कलाम आजाद                 10) रक्षा मंत्री ? उत्तर )सरदार बलदेव सिंह     11) वित्त मंत्री ? उत्तर) आर .के . सन्मुख  शेट्टी 12) संचार मंत्री  ? उत्तर )रफी अहमद किदवई  13) रेलवे और परिवहन मंत्री ? उत्तर )जॉन मथाई  14) मुख्य न्यायधीश ? उत्तर हरिलाल जे .कानिया (1950-1951) 15) भारत के प्रथम आई.सी .एस. अधिकारी ? उत्तर )सत्येंद्र नाथ टैगोर    ...
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