ASMO Mathematics 2019 — Primary 3 / Grade 3

Calculate 299,999 + 29,999 + 2,999 + 299 + 29 + 9.

What is the perimeter of the pictured I-shaped figure (all dimensions in centimetres)?

How many quadrilaterals are in the diagram?

Identify the pattern and fill the blank: 1×9+2=11; 12×9+3=111; 123×9+4=1111; …; 1234567×9+8=( ).

Given □ − ☆ = 36 and □ = ☆ + ☆ + ☆ + ☆, find □.

The number pattern is 240, 120, Y, 30, 15, … . Find the sum of the first and third numbers.

How many multiples of 3 lie between 10 and 40?

Twelve children stand in a line with 6 m between adjacent children. How long is the line from first to last?

Two boards nailed together measure 160 cm, with 45 cm of overlap. One board is 85 cm long. How long is the other?

Jia Xin finishes a book in three days: 27 pages on day one and 54 pages over the remaining two days. What is her daily average?

A worker makes 160 spare parts in four hours. At the same rate, how many in seven hours?

A number is increased by 5, multiplied by 6, then decreased by 9; the result is 27. What is the original number?

There are 220 chickens and ducks altogether. The number of chickens is 20 less than three times the number of ducks. How many of each?

The sequence 6, 7, 9, 8, 0, 1, 6, 7, 9, 8, 0, 1, … repeats. What is its 126th term?

Two Year 3 classes: after seven students move from the first to the second, the first class has three fewer students. How many more did the first class have originally?

Mei Mei is nine and her mother is 37 this year. After how many years will the mother be three times Mei Mei's age?

In the multiplication AB × 6 = 2AB, find A + B.

A wire is cut into 5-metre segments. Six cuts use the whole wire. How long was it?

A rectangle has perimeter 42 cm and its length is twice its width. What are the length and width?

Of 36 exam students, 21 got Question 1 right and 18 got Question 2 right. Everyone got at least one right. How many got both right?