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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.

  Menu   2 by 2 Set 1 Set 2 Set 3 Set 4 Set 5 Set 6 4 by 4   Help  

This is level 6: multiplication with multiples, primes and factors. You will be awarded a trophy if you get at least 5 of the puzzles correct and you do this activity online.

1
648
648
648
864 324 972 ×

Use only multiples of 3

2
6174
20580
10976
12348 10290 10976 ×

Use only multiples of 7

3
12
45
50
20 30 45 ×

Use only prime numbers

4
78
1463
1183
286 3211 147 ×

Use only prime numbers

5
325
92
442
20 338 1955 ×

Use only prime numbers

6
15341
6877
5083
8993 15341 3887 ×

Use only prime numbers

7
144
96
16
48 192 24 ×

Use only factors of 24

8
1080
600
10800
2160 900 3600 ×

Use only factors of 60

Check

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

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 1 August 'Starter of the Day' page by Peter Wright, St Joseph's College:

"Love using the Starter of the Day activities to get the students into Maths mode at the beginning of a lesson. Lots of interesting discussions and questions have arisen out of the activities.
Thanks for such a great resource!"

Comment recorded on the 28 May 'Starter of the Day' page by L Smith, Colwyn Bay:

"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

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Answers

There are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer.

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Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

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Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

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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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