1) What is the missing number? a) 11 b) 12 c) 13 2) What is the missing number? a) 48 b) 47 c) 74 3) What are the missing numbers? a) 98, 99 b) 99, 100 c) 97, 99 4) What is the missing numbers? a) 21 b) 30 c) 31 5) What are the missing numbers? a) 11, 12, 13 b) 10, 20, 30 c) 10, 11, 12 6) What are the missing numbers? a) 57, 58 b) 58, 59 c) 59, 60 7) What are the missing numbers? a) 57, 58 b) 58, 59 c) 59, 60 8) What are the missing numbers? a) 80, 81, 82 b) 79, 80, 81 c) 82, 83, 84 9) What are the missing numbers? a) 13, 15, 17 b) 13, 14, 15 c) 13, 15, 16

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