School Academy Kallil Methala Second Midterm Exam Model Questions and Answers STD VII Maths

Activity- 1

Draw a triangle of sides 5cm, 6cm and 7cm. Draw a triangle equal in area to this triangle and one of its angle 40°.

Activity- 2

The area of a rectangle is 3.25 square meters and its length is 2.5 metres. What is its width?

Activity- 3

There are 25 girls and 20 boys in a class. Write the ratio of their number?

Activity-4

a. Write 400 as the product of power of prime numbers.

b. If 5x= 625, find 5x-1

c. If 11³  1331 what is (1.1)³ ?

d. 729 =9x3x. What is x?

Activity- 5

Simplify

(i) 127-(17-19)

(ii) 97×15

(iii) (73×9)+(27×9)

(iv) (95×17) – (85×17)

(v) (71/2×25)-(31/2×25)

Answer

Activity 1

In triangle APB /_ PAB=40° triangles are of equal area.

Activity-2

Area of the rectangle = 3.25 sq.m. Length – 2.5m.

Length x width = 3.25

Width 3.25 ÷ 2.5 = 325 / 100 ÷ 25/10 =

325/100 x 10/25=13/10=1.3 m. 

Activity-3

Number of girls =25

Number of boys =20

When 25 and 20 are divided by 5

25 /5 = 5 20/5 =4 

Ratio = 5:4

Activity-4

a. 400=2×2×2×2×5×5=2√4×5√2

b.5x= 625 = 5 √4

5x-1=5³ = 125

c. (11)³ ×1331 

(1.1)³ = 1.331

C. 729=9 2×3 2; x=2

Activity-5

(i) 127-(17-19) = (127-17) +19 =110+19=129

(ii) 97×15 (100-3)×15 =100×15-3×15 = 1500-45= 1455

(iii) (73×9)+(27×9) = (73+27)×9 = 100×9=900

(iv) (95×17)-(85×17) = (95-85)×17= 10×17170

(v)71/2×25-3 1/2×25=25(71/2 -31/2) = 25×4=100