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Can I use my doubling and halving skills to solve problems? Each sequence below begins with a number. Can you keep doubling the number until you get to the end? 1) 2 2) 20 3) 50 4) 13 26 416 Some of the number sequences below are missing their numbers. The rule is to keep halving the previous number. Can you work out the missing numbers? 1) 64 16 2) 112 28 14 3) 40 5 4) 800 100 Can I use my doubling and halving skills to solve problems? Explore the following sequences but beware, there are some missing numbers! Explain if the pattern is doubling or halving. And work out the missing numbers of the sequence. 1) 13 26 2) 480 120 3) 96 24 4) 19 5) 10 6) 1120 7) 8 8) 25 9) 2016 10) 17 38 104 416 152 608 80 280 35 64 100 252 34 Follow the rule and write the first 10 numbers in the sequence. Just choose 3 to do from the list below. 11) 12) 13) 14) Rule: Rule: Rule: Rule: Double and add 1. Double and subtract 2. Double and add 2. Double and add 10. Starting Starting Starting Starting Number Number Number Number = = = = 12 27 19 25 Ultimate Challenge If you want to show off, then have a go at some of these. Can you write the next 3 numbers in the sequence? 16) 3, 7, 15, 31, 63. 17) 100, 60, 40, 30, 25. 18) 14, 26, 50, 98, 204. 19) 5, 15, 35, 75, 155. 20) 966, 482, 240, 118, 57