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maths pattern question

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christy053 | 12:36 Sun 11th Feb 2007 | Quizzes & Puzzles
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hi i usually understand these but on this question the amount of tiles between each pattern are different .
in pattern one there is 1 grey tile and 4 black tiles in pattern 2 there are 4 grey and 4 black tiles then in patten 3 there is 4 black tiles and 9 grey tiles . so how many tiles would there be in pattern number 8 ?
please can someone explain how to work it out ? thanks
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As I see it it could be 25Black 25Grey

1. 1G 4B difference of 3
2. 4G 4B same
3. 4B 9G diff of 5
4. 9B 9G same
5. 9G 16B diff of 7
6. 16G 16B
7. 16B 25G diff of 9
8. 25B 25G
Question Author
this is wrong because there will for sure be 4 blCk tiles in each pattern
ok, what about 25 grey and 4 black
black stays constant and grey goes up in 3, 5, 7 etc

How about 4 Black 64 Grey

1. 1 Grey 4 Black
2. 4G 4B
3. 4B 9G
4. 4B 16G
5. 25G 4B
6. 36G 4B
7. 4B 49G
8. 4B 64G

Black is constant and grey going up in odd numbers
Question Author
thankyou little owl i will try this . will let you no if your right x

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