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In or Out?

14 to 16

Weekly Problem 52 - 2014
Four arcs are drawn in a circle to create a shaded area. What fraction of the area of the circle is shaded?

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Digital Book

11 to 14

If it takes 852 digits to number all the pages of a book, what is the number of the last page?

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Five-to

11 to 14

The number 2005 is the sum of a sequence of five consecutive positive integers. What is the smallest of these integers?

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Gridlines

14 to 16

How many triples of points are there in this 4x4 array that lie on a straight line?

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Square Flower

14 to 16

The diagram shows 8 circles surrounding a region. What is the perimeter of the shaded region?

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Smile

14 to 16

Four semicircles are drawn on a line to form a shape. What is the area of this shape?

article

The Development of Spatial and Geometric Thinking: the Importance of Instruction

5 to 11

This article looks at levels of geometric thinking and the types of activities required to develop this thinking.

problem

Digit Discovery

7 to 11

Here is an interesting property about two sets of digits. Can you work out what the digits might be?

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Three Triangles

7 to 11

What do you notice when you put three triangles together?

article

Mathematical Problem Solving in the Early Years

This article describes how the NRICH Early Years resources aim to further develop young children's natural problem-solving abilities in the context of mathematics.

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In or Out?

Digital Book

Five-to

Gridlines

Square Flower

Smile

The Development of Spatial and Geometric Thinking: the Importance of Instruction

Digit Discovery

Three Triangles

Mathematical Problem Solving in the Early Years