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VTMO 2017 — Grade 2 — semifinal

Question 1

Find $N = \left(15 + 20 + 25 + 30\right) - \left(10 + 15 + 20 + 25\right)$.
  1. $5$
  2. $10$
  3. $15$
  4. $20$
  5. $25$

Question 2

A full kettle fills three bottles, each filling five cups. How many cups hold one kettle?
  1. $6$
  2. $12$
  3. $10$
  4. $8$
  5. $15$

Question 3

A glass of water weighs $150 g$. Pouring out half the water leaves $90 g$. What does the empty glass weigh?
  1. $30$
  2. $40$
  3. $50$
  4. $60$
  5. $70$

Question 4

Following the dot pattern, how many dots are in row $8$?

Question illustration
  1. $15$
  2. $22$
  3. $25$
  4. $29$
  5. $31$

Question 5

Floors $2$ to $4$ require $22$ steps. How many from $1$ to $6$, with equal floor intervals?
  1. $66$
  2. $55$
  3. $44$
  4. $33$
  5. $77$

Question 6

An leaves at $2 : 00$ and arrives $2 : 40$. Minh leaves $2 : 05$ and takes $25$ minutes. Phuong leaves $2 : 15$ and takes $20$ minutes. What is the arrival order?
  1. An, Minh, Phuong
  2. Phuong, Minh, An
  3. Phuong, An, Minh
  4. Minh, An, Phuong
  5. Minh, Phuong, An

Question 7

An has two more books than Binh; Binh three fewer than Chau; Dung four more than Chau. Which statement is false?
  1. Chau has three more than Binh.
  2. Chau has one more than An.
  3. Dung has seven more than Binh.
  4. An has one more than Chau.
  5. An has five fewer than Dung.

Question 8

$A , B , C$ in the number pyramid represent different numbers. Find $A + B + C$ using the pattern.

Question illustration
  1. $5$
  2. $20$
  3. $32$
  4. $37$
  5. Another answer

Question 9

$123$ has digit product $6$. How many three-digit numbers have digit product $6$?
  1. $3$
  2. $6$
  3. $9$
  4. $12$
  5. Another answer

Question 10

Tom writes $1$ through $50$. Jerry erases every number containing digit $2$. What is their sum?
  1. $245$
  2. $321$
  3. $76$
  4. $20$
  5. $333$

Question 11

There are $20$ crates, each containing either four pomelos or five oranges. There are $45$ oranges. How many pomelos?

Question 12

Father is $44$, and his three children are $7 , 9 , 12$. In how many years will their total age equal his?

Question 13

Giang adds two two-digit numbers, misreading a units $6$ as $9$ and a tens $1$ as $2$ in one number, obtaining $69$. What is the correct sum?

Question 14

Place $1 , 2 , 3 , 4 , 5 , 6$ in the six circles so each square’s vertices sum to $12$. What is the shaded pair’s sum?

Question illustration

Question 15

The pictured pyramid on a table consists of $84$ small cubes in four layers. How many cubes cannot be seen?

Question illustration