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Solve mathematical puzzles… We are learning to… •Test hypotheses; • Tabulate systematically the information in a problem or puzzle; • Identify and record the steps or calculations needed to solve it. Even if we change the order of the numbers on the bottom tier, the number at the top will always be the same. 8 3 1 5 2 3 4 5 Main Activity What plant is this? Interesting facts about mistletoe Mistletoe is a parasite that grows on other trees. Mistletoe grows mathematically. Every year, each branch will split in two… Year One Year Two Year Three How many new branches will there be next year? Year Four Year Number of new branches Year One Number of new branches 1 Two 2 Three 4 Four 8 Five Six Seven Eight Task One How many new branches will there be in the seventh year? Which year will be the first year to see over 500 new branches? Year New branches 1 1 2 2 3 4 4 8 5 16 6 32 7 64 8 128 9 256 10 512 11 1024 12 2048 13 4096 14 8192 15 16384 16 32768 17 65536 18 131072 19 262144 20 524288 Year New branches Total branches 1 1 1 2 2 3 3 4 7 4 8 5 16 6 32 7 64 8 128 9 256 10 512 11 1024 12 2048 13 4096 14 8192 15 16384 Task Two How many branches are there in total? Year New branches Total branches 1 1 1 2 2 3 3 4 7 4 8 15 5 16 31 6 32 63 7 64 127 8 128 255 9 256 511 10 512 1023 11 1024 2047 12 2048 4095 13 4096 8191 14 8192 16383 15 16384 32767 16 32768 65535 17 65536 131071 18 131072 262143 19 262144 524287 20 524288 1048575 Plenary What have we learnt? What strategies did you find useful?