Question 19
Study the picture. What is the missing number?

Use the simple consistent pattern intended by the examples.
Enter a whole number without units. The original answer sheet uses four digits with leading zeros (for example, 7 as 0007); leading zeros are optional here.

Use the simple consistent pattern intended by the examples.
Enter a whole number without units. The original answer sheet uses four digits with leading zeros (for example, 7 as 0007); leading zeros are optional here.