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Draw the well-labelled diagram of the human excretory system
Concept: Excretion: Substances to Be Eliminated
Principle of Electric motor
Concept: Electric Motor
Principle of Electric motor
Concept: Electric Motor
Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.
Concept: Some Natural Phenomena Due to Sunlight
State the laws of refraction of light.
Concept: Refraction of Light > Refraction Through a Rectangular Glass Slab
A three digit number is equal to 17 times the sum of its digits. If 198 is added to the number, the digits are interchanged. The addition of first and third digit is 1 less than middle digit. Find the number.
Concept: Algebraic Methods of Solving a Pair of Linear Equations > Substitution Method
Solve the following quadratic equation for x: `4x^2 + 4bx – (a^2 – b^2) = 0`
Concept: Solutions of Quadratic Equations by Completing the Square
Explain sex determination in human beings.
Concept: Sex Determination in Humans
If 12x +13y =29 and 13x +12y=21, find x + y.
Concept: Linear Equations in Two Variables Applications
Write the quadratic equation whose roots are ‒2 and ‒3.
Concept: Quadratic Equations
The divisor and quotient of the number 6123 are same and the remainder is half the divisor. Find the divisor.
Concept: Quadratic Equations Examples and Solutions
If α + β = 5 and α3 +β3 = 35, find the quadratic equation whose roots are α and β.
Concept: Quadratic Equations
If the quadratic equation px2 − 2√5px + 15 = 0 has two equal roots then find the value of p.
Concept: Nature of Roots
Write the first two terms of the sequence whose nth term is tn = 3n ‒ 4.
Concept: Arithmetic Progression
The 11th term and the 21st term of an A.P. are 16 and 29 respectively, then find:
(a) The first term and common difference
(b) The 34th term
(c) ‘n’ such that tn = 55
Concept: Arithmetic Progression
How many three digit natural numbers are divisible by 5?
Concept: Introduction to Sequence
Write the sample space for selecting a day randomly of the week.
Concept: Sample Space
In a certain race, there are three boys A, B, C. The winning probability of A is twice than B and the winning probability of B is twice than C. If P(A) + P(B) + P(C) = 1, then find the probability of win for each boy.
Concept: Basic Ideas of Probability
In a certain race, there are three boys A, B, C. The winning probability of A is twice than B and the winning probability of B is twice than C. If P(A) + P(B) + P(C) = 1, then find the probability of win for each boy.
Concept: Basic Ideas of Probability
Find the class mark of the classes 20-30 and 30-40.
Concept: Basic Ideas of Probability
