IKMC 2027 - Grades 1-2 - Self-study SET 8 - Thematic Batch 3

A kangaroo makes 10 jumps in 1 minute and then rests for 3 minutes. It then makes another 10 jumps in 1 minute and rests for 3 minutes, continuing in this way. After at least how many minutes can it have made 47 jumps?

When Pinocchio tells a lie, his nose grows by 6 cm. When he tells the truth, it becomes 2 cm shorter. His nose is 9 cm long. He tells the truth once and lies once. How long is his nose afterwards?

A square is cut into five pieces as shown. Which figure below cannot be made with all five pieces, with no overlapping?

Kate has 4 apples. Mary has 5 times as many apples as Kate. How many apples do they have altogether?

How many bricks must be moved from the left pile to the right pile so that the two piles contain equal numbers of bricks?

Ben has a 5×5 square with its central cell missing, as shown. He wants to cut the board entirely into identical pieces. Which of the following pieces cannot be obtained in this way?

Five square sheets of paper overlap as shown. If the sheets are removed one at a time from top to bottom, in what order are they removed?

Father buys 5 apples for each child. Ann gives Ben 2 apples, Ben gives Chris 3 apples, and Chris gives Daisy half of his apples. How many apples does Daisy have in all?

Put the digits 1,2,3,4,5 into the empty boxes so that both calculations are correct. Which digit can go in the box marked “?”?

Old Saigon, now Ho Chi Minh City, has changed a great deal. Yet the street named after Alexandre de Rhodes, the creator of the Vietnamese national script, remains unchanged. Walking there on an early summer morning, looking at the cool green rows of trees glowing in the shimmering sunlight, have you ever wondered: “Are those trees arranged in a pattern? Are the distances between consecutive trees equal? Do the rows contain equal numbers of trees? And can I calculate the number of trees along the whole street?”

Mai has the shapes in Figure 1 and builds the tower in Figure 2. Which shapes does she leave unused?

Consider the sequence of figures. Which number belongs in place of “?” in the last figure?

Tom arrives at school at 9 in the morning. He leaves when the clock shows the time pictured below. How long is he at school?

Today is the first school day of the new year, and Rabbit happily heads to school. But he likes to dawdle: he jumps forward 3 cells, then backward 1 cell. How many forward jumps does he need to reach school? Once he reaches school, he does not jump backward again.

Diệu wants to colour the small squares so that no two squares sharing a side have the same colour. What is the smallest number of colours she needs?

The teacher writes the numbers from 10 down to 1 on the board. Việt erases some of them. How many numbers does he erase?

For Vietnamese Teachers’ Day, a group of classmates visits their class teacher. The teacher stands at the window and looks at his pupils in the yard. How many pupils does he see?

Eric has 10 identical metal strips. He uses screws to join them in pairs, making five strips labelled A,B,C,D,E. Which joined strip is the longest?