Page 355 - Math_Genius_V1.0_C7_Flipbook

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\ 28-Jan-2025 Surender Prajapati Proof-5 Reader’s Sign _______________________ Date __________

B. Fill in the blanks.

1. If ‘n’ is an even integer, then (–1) = ................... .
n
2. “9 is added to 4 times p”. Algebraic expression related to the given statement is .................. .

3. The English alphabet B has .................... line of symmetry.
4. Angles of a triangle are in the ratio 2 : 5 : 11. Largest angle of the triangle is .................... .

5. Perimeter of a scalene triangle having lengths of sides as 2.5 cm, 3.5 cm and 1.5 cm is
.................... .

C. Write ‘T’ for true and ‘F’ for false statement.
1. Mode of the observations 3, 6, 9, 9, 8, 8, 8, 8, 4, 2, 1, 9, is 9.

2. A sphere has only 1 face which is curved. It has no edges and no corners.
3. The following integers are in ascending order.

–110, –96, –69, –28, –17
4. The fraction 2 must be added to 6 to get the fraction 54 .
5 7 35
5. If x, y, z and w are in proportion, then xz = yw.
D. Solve the following questions.
1. Following operations on integers a and b are defined such that:

a * b = a + b, a # b = a × b, a $ b = a ÷ b, using the given information, calculate the following.
(a) [3 * (–9)] # [(–7) * 2] (b) 9 $ 3 # 5 * 10

2. The sum of four consecutive even numbers is 108. Find the numbers.
3. Find all the angles in the given figures.

(a) (b)

(x + 2)° (x + 1)° (9x + 10)°

x° (6x)° O (3x + 8)°

4. Express: (a) 240 as the percentage of 800, (b) 495 cm as the percentage of 10 m.

5. Draw the line(s) of symmetry of following figures.

(a) (b) (c)

6. Name the shapes of which following nets are given.

(a) (b) (c) (d)

353 Model Test Paper – 2