ASMO Mathematics 2018 — Primary 3 / Grade 3

Calculate: 2018 − (2017 − 2016) + 2019 + 2018 − 2017.

Fill the missing number in 238, □, 216, 202, 186.

How many rectangles are shown in the diagram?

On the evenly spaced number line marked 2, A, 3, B, 4, what is A + B?

Mrs. Wong is 24 years older than Howard. Her age this year is four times Howard's age. How old is Mrs. Wong?

The five gaps between six planted trees span 15 metres. If trees are planted at the same spacing, what distance spans 22 trees?

Victor makes 120 accessories in three hours. How many can he make in five hours at the same rate?

A school has 816 students. There are 74 more boys than girls. How many boys are there?

Calculate 299999 + 29999 + 2999 + 299 + 29 + 9.

Rabbit says banana is heavier than peach; Monkey says banana is heavier than apple; Cat says apple is heavier than peach. Which fruit is lightest?

What is Y if 5 + 3 × Y − 8 = 27 ÷ 3?

In the vertical addition A31 + B7C = D81E, find A + B + C + D + E.

A circle, square and star represent different numbers. Two circles plus three squares equal 13; one square equals three stars; one star plus one square equals 4. What is circle + star + square?

In four Primary 3 classes, the average number of trees planted by classes A and C is 51, while classes B and D average 53. What is the average for all four classes?

Andy takes 30 minutes to cut a whole steel pipe into small pieces; each cut takes 6 minutes. How many pieces does he make?

How many multiples of 3 are there from 121 through 221?

Johnson has 45 stamps and Kelvin has 30. How many must Kelvin give Johnson so that Johnson has twice as many as Kelvin?

A corridor is 30 m long. Vases are placed every 5 m along both sides, including both ends. How many vases are there altogether?

What is the perimeter in metres of the pictured 18 m by 7 m rectangle with a 3 m-high smaller rectangle protruding from its top?

In the 3 × 3 grid, the top row is 3, 5, 6; the middle row is 20, 24, ?; and the bottom row is 7, 5, 9. What is ?