Grade 7

Which of the following results is correct?    

Observe the picture.

To balance the scale, that is, the needle on the scale's dial is the bisector of angle AOB. The weight on the scale on the left weighs

• 3,5kg

• 3kg

• 500g

• 4kg

The result of the calculation 0,(5) + 0,(4) is

• 1

• 0,(9)

• 9

• 0,9

Know that 1 inch ≈ 2.54 cm. How long is the diagonal of the 43-inch TV screen (rounded to the nearest unit)?

• 109,22 cm  

• 109,2 cm

• 110 cm

• 109 cm

Last Tet, to pack 20 banh chung, Mr. An needed 10kg of sticky rice. This year's Tet holiday, Mr. An is plan to pack 30 banh chung like last year, how many kilogram of sticky rice will be needed?

• 10kg

• 20kg

• 15kg

• 30kg

An aquarium has a square bottom with side 5 dm and height 8 dm. The volume of that fish tank is

To prepare for extracurricular activities with the theme "Language open day" held at Phung Chi Kien Secondary School, a group of students in class 7A1 participated in making a model. We know that 4 students completed the model in 12 hours. How many hours did it take 6 students to complete the model (knowing the productivity of each student is the same)?

• 2 hours

• 8 hours

• 18 hours

• 6 hours

The 4x4 Rubik's cube is shaped like a cube with sides of 6 cm. The Surface area of ​​the Rubik's is

The drawing depicts a two-wheeled vehicle whose container is in the shape of a Triangular right prism with the dimensions shown in the picture. The volume of the two-wheeled vehicle's tank is

• 240 000cm³   

• 120 000 cm³

• 12 000 cm³

• 24 000 cm³