Tips to solve Permutation and Combination Problems
Factorial Notation:Let n be a positive integer. Then, factorial n, denoted n! is defined as: n! = n(n – 1)(n – 2) … 3.2.1. Examples: We define 0! = 1.…
Tips and Tricks on H.C.F and L.C.M
Factors and Multiples:If number a divided another number b exactly, we say that a is a factor of b.In this case, b is called a multiple of a. Highest Common Factor (H.C.F.) or Greatest Common Measure (G.C.M.) or Greatest…
Tricks to Solve Problems on Square Root & Cube Root
Square Root If x2 = y, we say that the square root of y is x and we write √y = (+/-)x Thus, √4 = 2, -2 √9 = 3, -3 √196 = 14, -14 Cube Root: The…
Short Notes and Board Exams Questions: Life Processes
All living things perform certain life processes like growth, excretion, respiration, circulation etc. All the processes like respiration, digestion, which together keep the living…
Short Notes and Board Exam Questions : Sources Of Energy
• Energy comes in different forms and one form can be converted into another. • A source of energy is one which provide adequate amount…
Human Eye and Colourful World: Important Questions for Board Exams
CHECK YOUR KNOWLEDGE VERY SHORT ANSWER TYPE QUESTIONS 1. What type of lens is used to correct (a) Hypermetropia, (b) Myopia ? 2. Name the…
Short Notes On: The Human Eye and The Colourful World
Human eye : The sense organ that helps us to see. • Located in eye sockets in skull. • Diameter of eye ball – 2.3…
Control and Coordination, Important Questions For Board Exams
QUESTIONS VERY SHORT QUESTIONS (1 Mark) 1. Where is auxin synthesized in plants ? 2. Which gland is known as master gland ? 3. Name…
Short Notes on control and coordination
Control and Coordination • All the living organisms respond and react to changes in the environment around them. • The changes in the environment to…
नियन्त्रण एवं समन्वय ( बोर्ड परीक्षा में पूछे गए कुछ महवपूर्ण प्रश्न )
अतिलघुत्तरीय प्रश्न ( 1 अंक ) 1.पौधों में ऑक्सीजन कहाँ संश्लेषित होता हैं ? 2.कौन सी ग्रंथि मास्टर ग्रंथि कहलाती हैं ? 3.रक्त में शकरा की…