TIMO 2021 Grade 4 Heat Set 1

This month is March. Which month will it be 184 months later?

According to the pattern shown below, how many triangle(s) is / are there from the 1st to the 300th symbol counting from the left? ○ ○ △ ○ □ △ □ ○ ○ △ ○ □ △ □…

There are a total of 36 chickens and rabbits in a farm. The animals have a total of 96 legs. How many rabbit(s) is / are there?

Betty now has a few coins. If the number of coins minuses 13, then is divided by 10, adds 3 and is multiplied by 7. The result will be 91. How many coins does Betty have?

According to the pattern shown below, how many ＃ is / are there in the 9th group?

Find the value of 26÷$7+37$÷$7-10$÷$7+3$÷7.

Find the value of 81×$6+9$×$31-3$×26.

Find the value of 2020÷18×15×24÷100.

Find the value of $34+41+48+55+62+69+76+83+90+97$.

Using the method of S=2S−S, find the value of $7+14+28$+...+896.

The sum of 9 consecutive odd numbers is 1035. Find the value of the largest number.

Define the operation symbol a⊗b=(a×3+b−1)×(a−b), find the value of (6⊗4)⊗40.

Find the unit digit of A if $A=3$×8×13×18×23×28×...×2023×2028.

If a 10-digit number 2021A2723A is divisible by 6, find the value of A.

Mr. Wong gives some pencils to students. If everyone gets 9 pencils, 5 pencils will be left. If everyone gets 8 pencils, 19 pencils will be left. How many pencil(s) does Mr Wong have?

The figure below is formed by 4 identical right-angled triangles. The areas of the big and the small squares are 64 and 36 respectively. Find the perimeter of the triangle.

The area of a rectangle is 162. If the sides of the rectangle are integers, find the maximum of the perimeter of the rectangle.

At least how many squares can be seen if viewing the figure below from the right?

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

How many rectangle(s) with “*” is / are there in the figure below?