
Special numbers
My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?
How many more miles must the car travel before the numbers on the milometer and the trip meter contain the same digits in the same order?
Find out what a Deca Tree is and then work out how many leaves there will be after the woodcutter has cut off a trunk, a branch, a twig and a leaf.
There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. How many eggs are in each basket?
A hexagon, with sides alternately a and b units in length, is inscribed in a circle. How big is the radius of the circle?
Four bags contain a large number of 1s, 3s, 5s and 7s. Can you pick any ten numbers from the bags so that their total is 37?
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
How many different symmetrical shapes can you make by shading triangles or squares?