1) Alice says, “I have chosen an even positive number less than 20. It has no prime number next to it.” How many possible numbers could Alice have chosen? a) 0 b) 1 c) 2 d) 3 e) 4 2) Bob says, “I have chosen an odd positive number less than 15. It has no prime number next to it.” How many possible numbers could Bob have chosen? a) 0 b) 1 c) 2 d) 3 e) 4 3) Clara says, “I have chosen a positive number less than 10. It has no prime number next to it.” How many possible numbers could Clara have chosen? a) 0 b) 1 c) 2 d) 3 e) 4 4) David says, “I have chosen an even positive number less than 25. It has no prime number next to it.” How many possible numbers could David have chosen? a) 0 b) 1 c) 2 d) 3 e) 4 5) Emma says, “I have chosen an odd positive number less than 30. It has no prime number next to it.” How many possible numbers could Emma have chosen? a) 0 b) 1 c) 2 d) 3 e) 4

11+ Maths Prime numbers

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