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Bottle A contains 15% syrup. Bottle B contains 40% syrup. When these 2 bottles of syrup are mixed, the syrup content is 30% and the total volume is 600ml. How much syrup is in the bottle A at first?

Let ABCD be a trapezoid with bases AB, CD and O be the intersection of AC and BD. If the areas of triangle OAB, triangle OCD are 16cm², 40cm²respectively and M is the midpoint of BD, then the area of the triangle AMD is .........cm².

Suppose that the polynomial f(x) = x⁵ - x⁴ - 4x³ + 2x² + 4x + 1 has 5 solutions x₁; x₂; x₃; x₄; x₅. The other polynomial k(x) = x² - 4.
Find the value of P = k(x₁) x k(x₂) x k(x₃) x k(x₄) x k(x₅)

câu 1: A rectangle has a length of 60cm and a width of 30cm. It is cut into 2 indentical squares, 2 identical rectangles and a shaded small square. Find the area of the shaded square.
Find the area of the shaded square.

câu 2.The number of ordered pairs (x; y) where x, y ∈ N* such that x²y² - 2(x + y) is perfect square is ..........

câu 3.Let ABCD be the square with the side length 56cm. If E and F lie on CD, C respectively such that CF = 14cm and EAF = 45^o then CE = ........cm.

câu 4.

Given P(x) = (x² - 1/2 x - 1/2)¹⁰⁰⁸
If P(x) = a₂₀₁₆x²⁰¹⁶ + a₂₀₁₅x²⁰¹⁵ + ..... + a₁x + a₀
then the value of the sum a₀ + a₂ + a₄ + .... + a₂₀₁₄ is ...........

Let f(x) the polynomial given by f(x) = (1 + 2x + 3x² + 4x³ + 5x⁴ + 84x⁵)
Suppose that f(x) = a_o + a₁x + a₂x² + ..... + ..... + a₅₀x⁵⁰.
The value of T = a₁ + a₂ + .... + a₅₀ is .........

IV. Choose the word (a, b, c, or d) that best fits each of the blank spaces.
How can we keep our teeth (21) ______? Firstly, we ought to visit our (22) ____ twice a year. Secondly, we should brush our teeth (23) ____ a toothbrush and fluoride toothpaste at least twice a day, once after breakfast and once before we go to bed. We can also use toothpicks (24) _____between our teeth after a meal. Thirdly, we (25) ______ eat food that is good (26) ______ our teeth and our body: milk, fish, brown bread, raw vegetables, fresh fruit, etc.
21. a. health     b. healthy    c. healthily    d. unhealthy
22. a. dentist     b. doctor    c. teacher    d. engineer
23. a. on     b. of    c. by    d. with
24. A. clean    b. to clean    c. cleaning    d. to cleaning
25. a. should    b. ought to    c. need    d. a & b
26. a. for    b. at    c. on    d. to
V. Read the following passage and choose the item (a, b, c, or d) that best answers each of the questions about it.
A: Hi. Can I help you?
B: Yes, please. Could I have something fpr a cough? I think I’m getting a cold.
A: Well, I sugest a box of these cough syrup. And you should get a bottle of vitamin C, too.
B: Thank you. And what do you have for dry skin?
A: Try some of this new lotion. It’s very good.
B: OK. Thanks a lot.
27. What does the word ‘cold’ in line 2 mean?
a. low temperature         b. not hot or warm     
c. a common illness         d. not heated or cooked
28. The first speaker suggested that the second speaker should buy_____.
a. a box of cough syrup     b. a bottle of vitamin C 
c. a new lotion for dry skin     d. all are correct 
29. The second speaker is a_______.
a. patient     b. doctor     c. dentist         d. nurse
30. They are talking in a______.
a. theater     b. stadium     c. drugstore         d. dentist’s
31. Which of the following is not true?
a. Vitamin C is good for a cold.
b. Cough syrup is good for a cough. 
c. There is a new lotion for dry skin.
d. The second speaker doesn’t want to buy the new lotion.

Shall we go camping in Con Vanh Beach this Sunday?

Let......................................................................

What is the price of a bottle of cooking oil?

How much.........................................................

Is the police station is behind the post office?

Is the post office...............................................

My father is driving his car to Ha Noi.

My father is traveling...................................,......

Nam's father' car is white

Nam's father has................................................

How much beef do you want? How much beef would.............................

there are three floors in my new house. My new house............................

I cycle to school every day. I go............................................