You may also like

problem icon

Month Mania

Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?

problem icon

Neighbours

In a square in which the houses are evenly spaced, numbers 3 and 10 are opposite each other. What is the smallest and what is the largest possible number of houses in the square?

problem icon

Spelling Circle

Find the words hidden inside each of the circles by counting around a certain number of spaces to find each letter in turn.

Page Numbers

Age 7 to 11 Short Challenge Level:

Josh of Alameda Middle School, Ampthill, Beds, sends the following solution:

The digits up to page 10 add up to 11.

Then from 11 to 20 they add up to 20, which takes the total to 31.

From 21 to 30 they also add up to 20, which takes the total to 51, and so on.

At 40 the total is 71, at 50 the total is 91, at 60 the total us 111, at 70 the total is 131, at 80 the total is 151, at 90 the total is 171, at 99 the total is 189.

Page 100 makes it 192.

Page 101 makes it 195.