The movie started at 2:10 pm. It finished at 3:50 pm. How long was the movie ?

22 students from Class 2E join the Robotics Programming club. 16 students from the same class join the Badminton club. 5 of the students join both clubs. How many students are there in Class 2E if every student must join at least one club ?

20 students are queuing for their favourite food. Andy is the third in the queue. Ashley is the fifth from the end of the queue. How many students are queuing between the two of them ?

In an examination, 14 students in a class score A* in mathematics, 16 students score A* in English and 5 students score A* in both subjects. How many students are there in the class ? ( Assume each student scores at least one A* )

18 students in Class 2G subscribe to a widlife magazine. 24 students in the same class subcribe to a mathematics magazine. 8 of the students subcribe to both magazine. How many students are there in class 2G ?

There were 10 lamp posts along a road. A technician was informed to repair the third lamp post. Upon arrival, he realised he was at the other end of the road. How many lamp posts did he have to walk past before reaching the right lamp post ?

There are 14 students in a queue. Patrick is the fourth student in the queue. Melvin will be the sixth student if Patrick is the first one. What is Melvin’s queue number from the last student ?

A pentagon has 5 sides. Jason uses some beads to form a pentagon. Each side of the pentagon has 5 beads. How many beads does Jason need in all ?

28 flags are placed along a square field. Each side Of the field has the same number of flags. How many flags are there on each side of the field ?

At a carnival, a group of performers queue to form a square. One of the performers stands at the fifth position when counting from left, right, front or back. How many performers are the group ?

In the figure below, two water pipes of the same length are joined together.

How long is the new pipe if each pipe is 50 cm long ?

A bamboo pole is dipped in the water with one of its ends touches the bed as shown below, not drawn to scale.

A marking is made on the pole at water level. The pole is then taken out and its other end is now dipped in the water. Another marking is then made. The distance between the two markings is 40 cm. How long is the pole ?

A lesson starts at 8:10am. It lasts for 1 hour 10 minutes. At what time does the lesson end ?

How many different ways are there to write 1 2 3 4 5 from the figure below ?

How many different sums are there if you add two different numbers between 1 and 7 ?

To get into a badminton team, 6 players must play exactly one match with each other during the selection. How many matches are played altogether ?

How many two-digit numbers have the digit in the tens place smaller than that of the ones place ?

Two guests shake hands exactly once with one another. How many handskakes are exchanged among nine guests ?

There are two paths linking a school to a park. From the park, there are three paths leading to the library. There are four paths from the library to a shopping mall. How many different ways are there to go to the shopping mall from the school ?

A “ Happy Holiday!” greeting was exchanged exactly once between two good friends. How many “ Happy Holiday!” greetings were exchanged among five good friends ?

There are 4 points on the circle below. How many triangles can you draw using any three points ?

How many different ways are there to get a sum of 80 cents from two 50 cents, four 20 cents and eight 10 cents coins ?

How many different ways are there to make up 6 dollars from one 5 dollars note, three 2 dollars notes and six 1 dollar notes ?

Sân bay quốc tế Tân Sơn Nhất ở thành phố nào?

We put 2, 0, 1, 3 into an adding machine, as shown.

What is the result in the box with the question mark ?