John, Amy and Peter are good friends. One of them is a merchant. One of them is a student. One of them is a soldier. In addition, we know following situations: Peter's age is larger than soldier's. Student's age is smaller than Amy's. John's age is different from that of student's. Who is the student?

Age: Tuổi; Larger than: Lớn hơn; Smaller than: Bé hơn; Different from: Khác.

According to the pattern shown below, which symbol should be the 28th one starting from the left

Pattern: Quy luật; Symbol: Ký hiệu; From the left: Từ phía bên trái?

• ○

• △

• □

Amy bought a pair of beautiful shoes. Her classmates never saw this pair of shoes before and they start guessing. Peter said that “Your shoes are not red.” John said that “Your shoes are either yellow or black.” Andy said that “Your shoes must be black.” Within the point of view of these 3 people, two of them are correct and one of them is wrong. What colour are Amy’s shoes?

Guess: Đoán; Either yellow or black: Vàng hoặc đen; Point of view: Ý kiến; Two of them: Hai trong số họ; Correct: Đúng; Wrong: Sai; Color: Màu sắc.

• red

• yellow

• black

John wrote a 3-digit number on a piece of paper and asked Peter to guess it.

Peter asked: “Is the number 892?”

John replied: “One of the digits is correct, the position of that digit is also correct.” Peter asked again: “Is the number 178?”

John replied: “Two digits are correct, but the positions of those digits are both wrong.” Peter asked again: “Is the number 785?”

John said: “All three digits are correct, but the digits are all in the wrong places.”

What is the number written by John?

3-digit number: Số có 3 chữ số; Digit: Chữ số; Correct: Đúng; Wrong: Sai; The position of that

digit: Vị trí của chữ số đó; Number: Số

According to the pattern below, how many circles are there in the 10th group?

Pattern: Quy luật; Circle: Hình tròn; 10th Group: Nhóm thứ 10.

Find the value of 366 + 978 - 166 + 22.

Value: Giá trị.

Find the value of 13 + 14 + 15 + 16 + 17.

Value: Giá trị.

Find the value of 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20.

Value: Giá trị.

Find the value of 1 - 2 + 3 - 4 + 5 - 6 + 7 - 8 + 9 - 10 + 11.

Value: Giá trị.

If A and B are both 1-digit number, what is the value of A?

1-digit number: Số có 1 chữ số; Value: Giá trị.