Question

Q-11 Are the square root of all positive integer irrational ? If not, give an example of square root

of number that is a rational number .

Q-12 Evaluate 105 × 106 without multiplying directly .

Q-13 Each side of an equilateral triangle measures 8 cm . Find its area .

Q-14 Find a rational number between √3 √5 .

Q-15 How will you describe the position of a table lamp on your study table to another person ?

Q-16 In the adjoining figure, what value of will make AOB a straight line ?

C

(3 + 5)˚ (2 − 25)˚

A O B

Q-17 In which quadrant or in which axis do each of the points (-2, 4), (3, -1), (-1, 0), (1, 2) and (-3,

-5)

lie ?

Please answer with Solutions​

Answer 1

Answer:

No. Square roots of all positive integers are not irrational. Example 4, 9, 16, etc. are positive integers and their square roots are 2, 9 and 4 which are rational numbers.

Answer 2

No ; Example:

$\sqrt{9} = 3$ which is a rational number