Question 3 :
Simplify the expressions and find the value if x is equal to 2. 3(x + 2) + 5x - 7

Question 5 :
Express the following as a product of powers of their prime factors: 800

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ca70f59b460d7261eaf9.jpg' /> In the above figure, find the percent of the coloured part in the figure.

Question 18 :
State TRUE or FALSE. Two right angles are complementary to each other.

Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c7d1f59b460d7261e794.PNG' /> In the above figure, if two angles have a common vertex and their arms form opposite rays. Then how many angles are formed?

Question 21 :
A wire is in the shape of a rectangle. Its length is 40 cm and breadth is 22 cm. If the same wire is rebent in the shape of a square, what will be the measure of each side. Also find which shape encloses more area?

Question 22 :
Through a rectangular field of length 90 m and breadth 60 m, two roads are constructed which are parallel to the sides and cut each other at right angles through the centre of the fields. If the width of each road is 3 m, find (i)the area covered by the roads. (ii)the cost of constructing the roads at the rate of Rs.110 per $m^{2}$.

Question 25 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ca0ef59b460d7261ea74.png' /> Look at the above image and tell what type of triangle is it according to its sides.

Question 26 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ca1df59b460d7261ea89.png' /> From the above image, find angles x and y.

Question 27 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c96bf59b460d7261e9a0.png' /> ABC is an isosceles triangle with AB = AC and AD is one of its altitudes (See the above image). Is $ \triangle ADB \cong \triangle ADC$ ?

Question 28 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c96cf59b460d7261e9a1.png' /> ABC is an isosceles triangle with AB = AC and AD is one of its altitudes (See the above image). Is $\angle B = \angle C$?

Question 29 :
The lengths of two sides of a triangle are 12 cm and 15 cm.Then the length of the third side should fall between 3 cm and 27 cm?

Question 30 :
In a squared sheet, draw two triangles of equal areas such that the triangles are not congruent. What can you say about their perimeters?