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CBSE Questions

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What do you mean by velocity?
The difference between the present ages of a father and his son is 30years.five years ago,the son's age was one-seventh of the father's age.Find the age of each
The angles of a hexagon are in the ratio 1 : 2 : 3 : 5 : 6 : 7. Measure of the largest angle is?
A waiter’s salary consists of his basic pay and tips. During one month, his tips were 4 5 of his basic pay. What fraction of his income comes from tips?
what is the meaning of incandescence
What is actually mean by mole concept
Which element is mostly found in earth crust?
according to Archimedes, when an object is fully or partially immersed in a fluid then the object feels a buoyant force ....but in case of air , which is a fluid do not posses any buoyant force why?
why is the window panes of old buildings become thicker at the bottom?
Show that f:r->r defined by f(x)=1/x is one-one and onto, where R? is the set of all non-zero real numbers. Is the result true, if the domain R? is replaced by N with co-domain being same as R
Solve by factorisation. 1) 4x2 - 4a2x + a4 - b4 = 0 2) 1/a+b+x = 1/a + 1/b + 1/x
In an AP 5th and 12th terms are 30 and 65 respectively. What is the sum of first 20 terms
What are the functions of pseudopodia
which is the biggest tree in india
How do we make fertilizer?
Is it possible to convert sound energy to electrical energy and use it for charging etc for example a phone charger which charges a phone by converting sound energy to electrical energy??
why do animals living in cold region have thick fur?
How can we define de-urbanization?
What is ten percent law?
Why does the fruits ripen faster when they are kept in smoke?