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BBB 2021 - Grade 2 - Preliminary Round

Question 1

Find the value of $42+38-27-33+21$.
  1. 41
  2. 40
  3. 31
  4. 30

Question 2

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

Question illustration
  1. 8
  2. 7
  3. 9
  4. 6

Question 3

Andy places cubes on top of each other to get the figure below. At least how many cubes does he use?

Question illustration
  1. 23
  2. 15
  3. 21
  4. 17

Question 4

How many natural numbers are there from 41 to 76? (Include both end numbers)
  1. 117
  2. 37
  3. 35
  4. 36

Question 5

Find the value of $3\times8+7\times6+2\times9+2\times0+4\times9$.
  1. 100
  2. 120
  3. 122
  4. 102

Question 6

Find the value of $195+295+212+399+555+344$.
  1. 2500
  2. 1000
  3. 1500
  4. 2000

Question 7

According to the pattern, which number should be filled into the box?

$3,7,11,15,\square,23,\ldots$
  1. 19
  2. 16
  3. 18
  4. 20

Question 8

An egg weighs 40g. The weight of an apple is the same as that of 4 eggs. The weight of 4 bananas is the same as that of 5 apples. What is the weight of a banana in grams?
  1. 800
  2. 100
  3. 200
  4. 128

Question 9

By observing the pattern, what is the next figure?

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

Question 10

55 children stand at a column. Counting from the back, Fan is now standing at 12th. How many children are standing in front of Fan?
  1. 42
  2. 43
  3. 44
  4. 67

Question 11

If a cat can walk 4 meters in 8 minutes, how many meters can it walk in half an hour?
  1. 4
  2. 2
  3. 30
  4. 15

Question 12

Now there are 7 people in a room. Every 2 people will shake hands when they meet. How many “shaking-hand” times are there?
  1. 21
  2. 14
  3. 9
  4. 42

Question 13

Find the value of $4\times5+15\times11+35\times37+4\times25+40\times8$.
  1. 1900
  2. 1800
  3. 2000
  4. 1700

Question 14

Find the value of $101-108+99-106+107-114-117+124+118+116$.
  1. 210
  2. 220
  3. 200
  4. 190

Question 15

Teacher Mr Chan is now giving 43 candies to 8 children so that each child has the same number of candies. At least how many candies is teacher left with?
  1. 0
  2. 35
  3. 5
  4. 3

Question 16

Refer to the figure below, how many line segments are there?

Question illustration
  1. 10
  2. 12
  3. 13
  4. 11

Question 17

Refer to the following sequence, find the value of $A+B$.

$6,38,13,31,20,24,27,17,34,10,A,B,\ldots$
  1. 43
  2. 44
  3. 45
  4. 46

Question 18

A 2-digit number is divided by 7 to get a remainder of 3. Find the minimum value of this 2-digit number.
  1. 3
  2. 11
  3. 10
  4. 12

Question 19

When May was born, dad was 26 years old and mum is 4 years younger than dad. When May will be 18 years old, how old will mum be?
  1. 40
  2. 30
  3. 48
  4. 44