Sarah created a pattern. Her rule was add 4. All the numbers in Sarah‘s pattern were odd. 3 of the numbers in Sarah‘s pattern were less than 10. What was the starting number for Sarah‘s pattern?

Answer 1

The starting number for Sarah's pattern was 1.

The numbers in Sarah's pattern would be: 1, 5, 9, 13, 17, 21, ...

Three numbers in this pattern (1, 5, 9) are less than 10, and all numbers are odd, following the rule of adding 4 to the previous number.