Search

The Pet Graph
problem

The Pet Graph

7 to 11
filled star empty star empty star
Tim's class collected data about all their pets. Can you put the animal names under each column in the block graph using the information?
Continued Fractions I
article

Continued Fractions I

14 to 18

An article introducing continued fractions with some simple puzzles for the reader.

Oddly
problem

Oddly

7 to 11
filled star filled star filled star
Find the sum of all three-digit numbers each of whose digits is odd.
problem
Favourite

Ladybirds in the Garden

5 to 7
filled star filled star empty star

In Sam and Jill's garden there are two sorts of ladybirds with 7 spots or 4 spots. What numbers of total spots can you make?

Square Areas
problem

Square Areas

11 to 14
filled star filled star filled star
Can you work out the area of the inner square and give an explanation of how you did it?
Really Mr. Bond
problem

Really Mr. Bond

14 to 16
filled star filled star filled star

Can you explain what's happening with these numbers?

Alberta's Age
problem

Alberta's Age

14 to 16
filled star filled star empty star

Alberta won't reveal her age. Can you work it out from these clues?

Threes and Fours
problem

Threes and Fours

14 to 16
filled star empty star empty star

What is the smallest integer where every digit is a 3 or a 4 and it is divisible by both 3 and 4?

Radioactive Triangle
problem

Radioactive Triangle

11 to 14
filled star filled star empty star

Weekly Problem 41 - 2014
Three straight lines divide an equilateral triangle into seven regions. What is the side length of the original triangle?

Displaying 271 - 280 of 1096