Multiplication and division

Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?

How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?

Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?

Aisha's division and subtraction calculations both gave the same answer! Can you find some more examples?

Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?

A monkey with peaches, keeps a fraction of them each day, gives the rest away, and then eats one. How long can his peaches last?

Here is a chance to play a fractions version of the classic Countdown Game.

Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?

The clues for this Sudoku are the product of the numbers in adjacent squares.

Mr McGregor has a magic potting shed. Overnight, the number of plants in it doubles. He'd like to put the same number of plants in each of three gardens, planting one garden each day. Can he do it?