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Yohaku 3 by 3 Puzzles

Fill in the blank spaces so that the cells give the sum or the product shown in each row and column.

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This is level 5: multiplication with consecutive numbers. You will be awarded a trophy if you get at least 5 of the puzzles correct and you do this activity online.

1
45
192
42
162 40 56 ×

Use all of the numbers 1 to 9

2
12
160
189
90 144 28 ×

Use all of the numbers 1 to 9

3
168
360
60
160 378 60 ×

Use consecutive numbers

4
420
858
720
819 720 440 ×

Use consecutive numbers

5
7920
1920
8736
4032 5720 5760 ×

Use consecutive even numbers

6
11648
13200
13824
5760 24960 14784 ×

Use consecutive even numbers

7
5355
6325
2223
3825 6555 3003 ×

Use consecutive odd numbers

8
15225
3705
10557
7245 10179 8075 ×

Use consecutive odd numbers

Check

This is Yohaku 3 by 3 Puzzles level 5. You can also try:
Level 1 Level 2 Level 3 Level 4 Level 6

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

Why am I learning this?

Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician?

Comment recorded on the 19 June 'Starter of the Day' page by Nikki Jordan, Braunton School, Devon:

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Comment recorded on the 24 May 'Starter of the Day' page by Ruth Seward, Hagley Park Sports College:

"Find the starters wonderful; students enjoy them and often want to use the idea generated by the starter in other parts of the lesson. Keep up the good work"

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Scan the QR code below to visit the online version of this activity.

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https://www.Transum.org/go/?Num=771

Description of Levels

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2 by 2 Puzzles - A good place to start before takling these three by three monsters!

Set 1 - Addition with some numbers given

Set 2 - Addition with consecutive numbers

Set 3 - Addition with multiples, primes and factors

Set 4 - Multiplication with no restrictions

Set 5 - Multiplication with consecutive numbers

Set 6 - Multiplication with multiples, primes and factors

4 by 4 Puzzles - You must be joking - four by four - really?

More Puzzles - A huge collection of mathematical puzzles for you to enjoy.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

Log in Sign up

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