PIMSO 2023 - Mathematics - Grade 1 - National Round

How many even numbers are greater than 10 but less than 70?

Ben has eight pieces of candy. If Ben gives two candies to Bang, then they would have an equal number of candies. How many candies does Bang have originally?

Evaluate: 3 + 6 + 9 + 12 + 15 + 18 + 21

If x + x + 12 = 20, what is x?

What is ⅓ of 84?

If a + b = 12, and a = b , what is a?

If you are on page 20 of a book, and you turn 3 pages back, what page number are you on?

In a tree, after 3 apples fell off, there are 7 apples left on the tree. How many apples were on the tree originally?

In a case, if 5 pencils are broken, there are 10 pencils that are not broken. How many pencils are in the box?

Look at the pattern: 1, 3, 6, 10, __. What number comes next in the pattern?

A store ordered 100 notebooks, but they received only 90. How many notebooks are they short?

How many triangles are there?

What is the fraction equivalent to 1/2 + 1/4?

What is the sum of the digits of 246?

What is the greatest even number that is less than 20?

What is the fraction that represents 3 out of 5 parts?

Calculate the value of 10 divided by 5, plus 3.

What is the value of 6 multiplied by 2, plus 3.

How many sides does a decagon have?

Which has more sides, a hexagon or an octagon?