Đề thi Toán quốc tế SASMO LỚP 3

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Question 4

It is given that ađ b = ax b + a - b. For example, 2 ® 3 = 2 x 3 + 2 - 3 = 5. Find the

value of 4 ® 3 - 3 ® 4.

Question 3 Find the number B such that the following statement is true:

8 x B = 3 x 9 + 5 x 9.

Question 2 A textbook is opened at random. To what pages is it opened if the product of the

facing pages is 110?

Question 1 Jane is 9 years old and John is 5 years old. How old will John be when Jane is 15

years old?

SASMO 2014 Primary 3 (Grade 3) Contest

SASMO 2014, Primary 3 (Grade 3) Contest

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Question 7

On National Day, 39 soldiers lined up in a straight row on opposite sides of Stadium

Street to welcome Prime Minister Lee. A soldier stands on each end of Stadium Street.

The distance between two adjacent soldiers on either side was 20 m. The soldiers on

one side were arranged such that each soldier filled the gap between two other soldiers

on the opposite side. How long was Stadium Street?

Question 6 Find the missing term in the following sequence:

1, 2, 6, 24, 720.

Question 5 Jane has a rope of length 23 cm. She wants to cut the rope so that she can form the

biggest possible square, where the length of each side, In cm, Is a whole number. What

is the length of the rope that she must cut to form the square?

SASMO 2014, Primary 3 (Grade 3) Contest

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Question 10

Ali uses identical square tiles to make the following figures. If he continues using the

same pattern, how many tiles will there be in the 151t1 figure?

Question 9 At a workshop, there are 10 participants. Each of them shakes hand once with one

another. How many handshakes are there?

Question 8 A shop sells sweets where every 3 sweet wrappers can be exchanged for one more

sweet. Sharon has enough money to buy only 11 sweets. What Is the biggest number of

sweets that she can get from the shop?

SASMO 2014, Primary 3 (Grade 3) Contest

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Question 14 If the three-digit number 3N3 is divided by 9, the remainder is 1. Find N.

Question 13

The total cost of a pen and a pencil is $2.90. The pen costs 60¢ more than the pencil.

What much does the pen cost?

Question 12 A vending machine accepts 10¢ coins, 20¢ coins, 50¢ coins and $1 coins only. Ivy wants

to buy a can of drinks that costs $1.60. She has eight 10¢ coins, three 20¢ coins, two

50¢ coins and one $1 coin. If she wants to get rid of as many coins as possible, what is

the combination of coins that she should put inside the vending machine?

Question 11 What is the least number of cuts required to cut 16 ldent\cal sausages so that they can

be shared equally among 24 people?

SASMO 2014, Primary 3 (Grade 3) Contest

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Question 17 Find the total number of triangles in the diagram.

S E E

+ A

A S

Question 16 In the following alphametic, all the different letters stand for different digits. Find the

three-digit sum SEE.

Question 1~ Charles has 16 marbles. He divides them Into 4 plies so that each pile has a different

number of marbles. Find the smallest possible number of marbles In the biggest pile.

SASMO 2014, Primary 3 (Grade 3) Contest