Transum Software

Yohaku Puzzles

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

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

This is level 3: addition 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
33
15
30 18 +

Use only multiples of 3

2
77
105
84 98 +

Use only multiples of 7

3
18
34
22 30 +

Use only prime numbers

4
38
46
42 42 +

Use only prime numbers

5
84
84
90 78 +

Use only prime numbers

6
74
88
54 108 +

Use only prime numbers

7
20
16
12 24 +

Use only factors of 24

8
8
21
10 19 +

Use only factors of 60

Check

This is Yohaku Puzzles level 3. You can also try:
Level 1 Level 2 Level 4 Level 5 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 25 June 'Starter of the Day' page by Inger.kisby@herts and essex.herts.sch.uk, :

"We all love your starters. It is so good to have such a collection. We use them for all age groups and abilities. Have particularly enjoyed KIM's game, as we have not used that for Mathematics before. Keep up the good work and thank you very much
Best wishes from Inger Kisby"

Comment recorded on the 3 October 'Starter of the Day' page by Mrs Johnstone, 7Je:

"I think this is a brilliant website as all the students enjoy doing the puzzles and it is a brilliant way to start a lesson."

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Answers

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

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https://www.Transum.org/go/?Num=563

Description of Levels

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Set 1 - Addition with no restrictions

Set 2 - Addition with only 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

3 by 3 Puzzles - Similar puzzles but a little more challenging.

4 by 4 Puzzles - Similar puzzles but a lot more challenging.

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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