Time to put your addition and problem solving skills to the test, Year 4! We've got 3 investigations, the first one is the easiest but the last is a real challenge. Pick any 2, or test yourself with all 3. Remember with investigations that there's nothing wrong with getting it wrong the first time - this is called trial and error and helps you get the answer, because you can take out wrong options. Good luck, read the instructions carefully and see how you do!
Rerrange these three 1s, three 2s and three 3s in the square so that every row, column and diagonal adds to the same total.
1 1 1
2 2 2
3 3 3
In this maze there are numbers in each of the cells. You go through adding all the numbers that you pass. You may not go through any cell more than once.
Can you find a way through in which the numbers add to exactly 100?
What is the lowest number you can make going through the maze?
What is the highest number you can make going through the maze? (Remember you may not go through any cell more than once.)
Challenge! Each one of these letters is replacing a number, 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9. Can you figure out which letter is which number so that this column addition sum is correct? Don't be afraid to get it wrong at first - you'll have to!