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PIMSO 2025 - Mathematics - Kindergarten - National Round

Question 1

What is the sum of 3 + 8 + 5 + 6?
  1. 20
  2. 21
  3. 22
  4. 23

Question 2

What will you add to 6 to get 21?
  1. 15
  2. 16
  3. 17
  4. 18

Question 3

What is the missing number in the pattern below?
5, 9, 13, 17, 21, ____ , …
  1. 24
  2. 25
  3. 26
  4. 27

Question 4

What is the 13th shape in the pattern below?

Question illustration
  1. Square
  2. Triangle
  3. Star
  4. Circle

Question 5

In the number sentence, 23 - ❄ = 9, what is the value of ❄?

Original symbol detail: Question illustration
  1. 12
  2. 13
  3. 14
  4. 15

Question 7

Cards A, B, and C have either number 21, 20, 27 and 11 behind them.
Card A has an even number.
Card B is the sum of five and six.
Card C is the biggest odd number
What is the number written on Card D?

Question illustration

Editorial note: use the four cards pictured, one listed number per card; the opening list omits D.
  1. 20
  2. 21
  3. 27
  4. 11

Question 8

The numbers in the box below are covered with a handkerchief. How many digit “3” are covered?

Question illustration
  1. 4
  2. 5
  3. 6
  4. 7

Question 9

What is the digit B in “1B + B1 = 55”?
  1. 4
  2. 5
  3. 6
  4. 7

Question 10

In Ana’s class, there are 4 boxes of different colors: green, blue, red, and yellow.
- The green box is not the smallest box.
- The blue box is bigger than the green box.
- The red box is smaller than the yellow box.
- The yellow box is not the biggest.
Which box is the smallest?
  1. Green
  2. Blue
  3. Red
  4. Yellow

Question 11

During an earthquake drill, 11 pupils, including Roberto, form a line. If 7 pupils are in front of him, what is his position from the back?
  1. 3
  2. 4
  3. 5
  4. 6

Question 12

Based on the given pattern below, what is the value of P + Q?
3, 4, 6, 9, 13, P, Q …
  1. 24
  2. 30
  3. 34
  4. 42

Question 13

The illustration below shows the balance of fruit weights. Given the weight relations, how many mangosteen(s) weigh the same as a watermelon?

Question illustration
  1. 8
  2. 10
  3. 12
  4. 14

Question 14

Analyn is 7 years old this year. Her brother Analwin is now 12 years old. What is the sum of their ages next year?
  1. 19
  2. 20
  3. 21
  4. 22

Question 15

How many sides does the arrow below have?

Question illustration
  1. 7
  2. 8
  3. 9
  4. 10

Question 16

How many corners does the figure below have?

Question illustration
  1. 8
  2. 7
  3. 6
  4. 5

Question 17

What is the total number of sides of the three stars below?

Question illustration
  1. 10
  2. 15
  3. 25
  4. 30

Question 18

How many triangles of different sizes are there in the figure below?

Question illustration
  1. 2
  2. 3
  3. 4
  4. 5

Question 19

How many squares can you see when you look from the top?

Question illustration
  1. 11
  2. 12
  3. 13
  4. 14

Question 20

How many rectangles are there in the figure?

Question illustration
  1. 4
  2. 5
  3. 7
  4. 8