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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
108
864
972
648 864 162 ×

Use only multiples of 3

✓ ✗

2
2744
16464
17150
5488 13720 10290 ×

Use only multiples of 7

✓ ✗

3
70
105
63
63 175 42 ×

Use only prime numbers

✓ ✗

4
130
741
715
429 190 845 ×

Use only prime numbers

✓ ✗

5
754
715
255
130 2465 429 ×

Use only prime numbers

✓ ✗

6
6877
9367
5681
5083 8303 8671 ×

Use only prime numbers

✓ ✗

7
288
128
576
1536 384 36 ×

Use only factors of 24

✓ ✗

8
3600
1800
360
500 216 21600 ×

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.

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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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