Maths quiz -2

                Maths quiz -2.                  

21. cot(90-Q) = ?

 Ans .TanQ.

22. In which quadrant does (-3,5) lie?

 Ans.II.

23. Two triangles are said to be similar to each other if:-

  Ans. (1). Their corresponding angles are equal.

   (2). Their corresponding sides are proportional.

24. If the diagonals of a quadrilateral divides each other proportionally then it is a :-

 Ans. Trapezium.

25. How many tangent passing through a point lying on a circle?

 Ans. only one.

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26 .Who was the father of mathematics?

Ans:  Archimedes 

27.Who discoverd zero?

Ans : Aryabhatta.

28.What is the formula of difference between two squares?

Ans: a² - b² =. (a+b) ( a-b)

29.What is the range of probability?

Ans : 0 ≤ p ≤ 1.

30.What is the value of tan30?

Ans. 1/√3

31.What is the smallest composite no.?

Ans: 4.

32.What is the square of 24?

Ans : 576.

33.What is the distance formula?

D=. ✓ (x1 - x2)² + (y1- y2) ².

34.What is the relation between Mean,Median and Mode?

Ans. Mode =  3 median - 2 mean                                                                      

35. How many ratios are in trigonometry study?

Ans: six ratioes ( sin,cos ,tan ,cot ,sec cosec)

36.Angle greater than 180 degrees but less than 360 degrees are called?

Ans:  Reflex angle.     

37. How many zeroes are there in one billion?

Ans : 1 million has 7 numerals in it, 1 followed by 6 zeroes, So it is written as 1000,000

38.Which no. does not have a reciprocal?

Ans zero

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39-What is the area of a equilateral triangle?

Answer (√3/4) a²

40-what is the value of π in degree?

Answer-  180°

                                                                                  

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