1. Find the HCF of 21 and 32.2. Find the LCM of 26 and 39.3. Find the

1.	1. Find the HCF of 21 and 32.2. Find the LCM of 26 and 39.3. Find the ratio of 1.5kg to 210g.4. A map is given with a scale of 2cm=1000km . What is the actual distance between the two places in kms, ifthe distance in the map is 2.5cm. ( apply proportion rule)5. Find the total surface area of cuboid with l=4m,b=3m and h=1.5m.6. Suppose the perimeter of one face of a cube is 24cm. What is its volume. 7. Simplify: 7x - 9y + 3 - 3x - 5y + 8.8. Subtract: -2xy+3xy² from 8xy.9. Evaluate using identity (3x-5y)².10.Evaluate using identity 55 x 45.11.In a right angled triangle, if one of the other two angles Is 40°,find the remaining angle. 12.An exterior angle of a triangle is 80° and one of the interior opposite angles is 30°.Find the other two angles of the triangle.13.Simplify : (2/3)⁸ x (6/4)³.
Answer» Answer: 1 ) HCF of 21 and 32 is 1 2 ) 13 3 ) 50 : 7 4 ) 1,500 km 5 ) 18

1. Find the HCF of 21 and 32.2. Find the LCM of 26 and 39.3. Find the ratio of 1.5kg to 210g.4. A map is given with a scale of 2cm=1000km . What is the actual distance between the two places in kms, ifthe distance in the map is 2.5cm. ( apply proportion rule)5. Find the total surface area of cuboid with l=4m,b=3m and h=1.5m.6. Suppose the perimeter of one face of a cube is 24cm. What is its volume. 7. Simplify: 7x - 9y + 3 - 3x - 5y + 8.8. Subtract: -2xy+3xy² from 8xy.9. Evaluate using identity (3x-5y)².10.Evaluate using identity 55 x 45.11.In a right angled triangle, if one of the other two angles Is 40°,find the remaining angle. 12.An exterior angle of a triangle is 80° and one of the interior opposite angles is 30°.Find the other two angles of the triangle.13.Simplify : (2/3)⁸ x (6/4)³.

Answer»

Answer:

1 ) HCF of 21 and 32 is 1

2 ) 13

3 ) 50 : 7

4 ) 1,500 km

5 ) 18

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