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BBB 2022 - Grade 3 - Preliminary Round

Question 1

Find the value of $3972-1396+2845$.
  1. 5421
  2. 5241
  3. 5431
  4. 5412

Question 2

The age of Oliver 4 years ago was equal to the age of Andree 7 years ago. Given Andree is 32 years old now, how old is Oliver now?
  1. 35
  2. 29
  3. 43
  4. 21

Question 3

Find the value of $19\times 9$.
  1. 179
  2. 171
  3. 181
  4. 189

Question 4

How many 2-digit even numbers with identical digits are there?
  1. 6
  2. 9
  3. 5
  4. 4

Question 5

Find the value of $30:1+30:2+30:3$.
  1. 6
  2. 45
  3. 55
  4. 5

Question 6

Define the operation symbol $a\otimes b=b\times(a+b)$, find the value of $4\oplus 7$.

Source typo note: the defined and queried symbols differ. For the intended-answer key, use the defined operation; the literal queried operation has no supplied definition.
  1. 77
  2. 44
  3. 28
  4. 11

Question 7

Find the value of $10-17+22-15+20$.
  1. 20
  2. 24
  3. 30
  4. 34

Question 8

Jack and Jane have 37 coins altogether. If the number of Jack’s coins is 13 more than that of Jane, how many coins does Jane have?
  1. 50
  2. 24
  3. 25
  4. 12

Question 9

Observe the figure below. At least how many square faces can be seen from the front?

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

Question 10

If Anna can fold 4 stars in 8 minutes, how many stars can she fold in an hour?
  1. 60
  2. 30
  3. 120
  4. 240

Question 11

Today is Wednesday. Which day of the week was it 22 days ago?
  1. Thursday
  2. Friday
  3. Monday
  4. Tuesday

Question 12

Find the value of $3+6+9+12+\cdots+24+27$.
  1. 135
  2. 140
  3. 145
  4. 130

Question 13

The sum of A and B is 30. A is 5 times of B. Find the value of B.
  1. 6
  2. 5
  3. 25
  4. 24

Question 14

There are some dogs on the yard. Ned counts and sees that their total number of legs is 24 more than their total number of noses. How many dogs are there in total?
  1. 4
  2. 6
  3. 8
  4. 12

Question 15

Refer to the figure below, how many squares are there?

Question illustration
  1. 14
  2. 20
  3. 23
  4. 27

Question 16

Henry had some apples. He ate 5 apples and threw away 7 rotten apples. Then, he bought 8 more apples and gave half of his apples to his sister. Finally, he had 20 apples. How many apples did he have originally?
  1. 20
  2. 36
  3. 60
  4. 44

Question 17

It requires 12 minutes to cut a piece of wood into 4 sections. If the time required to cut into each section is the same, how many minutes are required to cut into 9 sections?
  1. 36
  2. 32
  3. 24
  4. 27

Question 18

Refer to the following figure, how many rectangle(s) is / are there with the star?

Question illustration
  1. 32
  2. 24
  3. 30
  4. 36

Question 19

How many 2-digit even numbers are there?
  1. 55
  2. 40
  3. 50
  4. 45

Question 20

There are 8 identical square pieces of paper. Fiona and Ariel arranges them in 2 different ways as below. Given that the perimeter of Fiona’s figure is 12 cm more than that of Ariel’s figure. Find the total perimeter of 2 figures.

Question illustration
  1. 100 cm
  2. 104 cm
  3. 108 cm
  4. 112 cm