Linh buys a box of marbles consisting of: 4 red marbles, 6 blue marbles, and 10 yellow marbles. Each red marble costs 500 VND, each blue marble costs 200 VND, each yellow marble costs 100 VND. How much more or less is the total cost of the red marbles compared to the total cost of the blue marbles?
The supplied key prints correct-answer weights of 4 and 6 points. Wrong-answer and blank-answer scoring are not stated; no penalties or blank credit are inferred.
During summer vacation, An and Binh both sell newspapers. In one day, An sells newspapers for 3 hours, Binh sells newspapers for 5 hours. Assume that the amount of money each earns per hour is the same. It is known that in one day, Binh earns 60 thousand VND more than An. In one day, how much money do both An and Binh earn in total in thousand VND?
There are 15 students standing in line to buy movie tickets. Ken is in the 5th position from the front. What is Ken’s position from the end of the line?
Mr. Minh is a carpenter. He has a long piece of wood and wants to cut it into equal parts to make chair legs. Previously, Mr. Minh cut this piece of wood into 4 equal parts, which took him 15 minutes. This time, if Mr. Minh wants to cut the same kind of wood into 6 equal parts, how many minutes will he need to complete the work?
An’s mother buys a pizza that has been cut into 8 equal slices as shown in the picture. An eats 2 slices of the pizza. Which fraction represents the part of the pizza that remains compared to the whole original pizza?
The pizza image is a faithful mathematical redraw of the source photograph.
Ms. Lan is an Art teacher. She draws four advertising boards shaped as follows. Ms. Lan wants to choose the board with the largest area to hang in front of the school gate. Which board should Ms. Lan choose?
On the table, there are 4 books stacked on top of each other: Math, Literature, English, and Science. It is known that: the Math book is below the Science book, the English book is above the Literature book, the Science book is between the Literature and English books. Which book is on the top?
Ms. Hoa wants to repaint a rectangle window like the one as follows, making it look beautiful and symmetrical about the center of the window. Currently, parts labeled 1 and 2 are still unpainted (they remain white). Which colors should Ms. Hoa paint parts 1 and 2 to make the window completely symmetrical?
Mai registers for a summer course called “Exploring Science.” The class starts on Tuesday, July 2nd, and takes place every Tuesday, Thursday, and Saturday each week. The course lasts for 20 sessions. On which day of the week is the last session of the course?
Lan arranged several rectangular cards, each measuring 3 cm by 9 cm, to form a larger rectangle as shown in the illustration. The perimeter of the large rectangle is:
The double bar chart below shows the number of books that four students have read in the past two months. Which student reads the most books on average each month?
There are 4 boxes in a cupboard, labeled 1, 2, 3, and 4. Only one of these boxes contains a prize. Each box has a sentence written on it: Box 1: “The prize is in Box 2.” Box 2: “The prize is in here.” Box 3: “The prize is not in here.” Box 4: “The prize is in Box 1.” Only one of these sentences is true. Which box contains the prize?
Lan, Minh, and Ha are playing a candy-counting game. Lan has 3 more candies than Minh. Ha has 2 fewer candies than Lan. The total number of candies they all have is 22. How many candies does Minh have?
At “Na’s Delicious Bakery,” pizzas are sold at a special price. The first pizza costs 150 thousand VND. For any additional pizzas purchased, each one is discounted by one-third of the price of the first pizza. An wants to buy as many pizzas as possible and currently has 750 thousand VND. How many pizzas can An buy in total?
FaVi Bookstore is offering a product combo as shown in the picture below. MiA currently has total savings of 250,000 VND. Each week, she saves an additional 50,000 VND. In at least how many more weeks will MiA be able to afford the product combo from the store above?
Minh is conducting an experiment with plant seeds. He has 4 different types of seeds: mung bean seeds, black bean seeds, soybean seeds, and red bean seeds. To create a sample plant pot, Minh needs to choose 2 different types of seeds to plant at the same time. How many ways can Minh choose 2 different types of seeds from these 4 types?
Huong’s family is preparing for a birthday party. Huong’s mother asks her to make a special beverage using the following recipe for every 1 liter of drink: 400 ml of fruit juice, 250 ml of sugar syrup and 350 ml of water. Huong’s mother has a large container and wants to prepare enough beverage for 15 guests. It is known that each guest will drink about 200 ml of the beverage. How many milliliters of fruit juice does Huong need to use to make enough beverage for everyone?
Khoa’s family is walking from their house to the park for exercise. The distance from their house to the park is 1.8 km (which is 1,800 meters). They start walking at 7:00 a.m. Khoa’s family walks through different sections of the route at different speeds:
- Section 1: On the first 600 meters, they go up a slope and can only walk at a speed of 40 meters per minute.
- Section 2: After the slope, on the next 900 meters of flat road, they increase their speed to 75 meters per minute.
- Section 3: On the remaining distance to the park, they slow down to enjoy the scenery and walk at 30 meters per minute. At what time does the family arrive at the park?
