148-x/25-1 + 169-x/23-2 + 186-x/21-3 + 199-x/19-4
123-x/25 + 123-x/23 + 123-x/21 + 123-x/19 =0

123-x=0 => x=123

Choose the letter A, B, C or D to complete the passage below

This is Peter. He is twelve years old. He is a student. He ___________ (6) in a big villa in the suburb of the city. There __________ (7) 4 people in his family: his parents, his younger sister and him. His father is an engineer. His mother is a teacher. And his younger sister is a pupil. There are 5 rooms ________ (8) his house: living room, kitchen, bathroom, bedroom and toilet. The living room is his _________ (9) place ________ (10) he can sit on the armchair and watch television with his family.

Question 10:

A. because

B. but

C. so

D. however

Viết phân số thập phân thích hợp vào chỗ chấm dưới mỗi vạch của tia số: