Counting on in 2s, 43 - 45 - 47 - 49, Counting back in 2s, 60 - 58 - 56 - 54, Counting on in 10s, 26 - 36 - 46 - 44, Counting back in 10s, 89 - 99 - 79 - 69, Counting on in 5s, 55 - 60 - 65 - 75, Counting back in 5s, 90 - 85 - 80 - 75, Counting on in 1s, 32 - 33 - 34 - 35, Counting back in 1s, 87 - 86 - 85 - 84

Finding the sequence rule

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