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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 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
54
648
162 216 ×

Use only multiples of 3

2
2058
2205
1470 3087 ×

Use only multiples of 7

3
121
46
253 22 ×

Use only prime numbers

4
247
169
169 247 ×

Use only prime numbers

5
1927
1189
1927 1189 ×

Use only prime numbers

6
689
899
377 1643 ×

Use only prime numbers

7
24
288
192 36 ×

Use only factors of 24

8
60
360
24 900 ×

Use only factors of 60

Check

This is Yohaku 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?

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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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