You may also like

problem icon

Double Digit

Choose two digits and arrange them to make two double-digit numbers. Now add your double-digit numbers. Now add your single digit numbers. Divide your double-digit answer by your single-digit answer. Try lots of examples. What happens? Can you explain it?

problem icon

Number Detective

Follow the clues to find the mystery number.

problem icon

Six Is the Sum

What do the digits in the number fifteen add up to? How many other numbers have digits with the same total but no zeros?

Subtraction Surprise

Age 7 to 14 Challenge Level:
Take a look at the images below, taken from the video.


What do you notice?
​What is the same? What is different?

 

What do you notice?
​What is the same? What is different?

 

What do you notice?
​What is the same? What is different?