In this question, you are asked to determine the number opposite to 3 on a dice according to the provided pictures. Each option offers a possible answer, namely 1, 4, 5, or data insufficient. The answer to this kind of problem normally depends on the arrangement of the numbers in the dice which should be provided in the pictures.

Option 1 suggests that the number opposite of 3 is 1. Option 2 suggests it`s 4. Option 3 suggests it`s 5. However, according to the conventional arrangement of a dice, the sum of the number on two opposite faces is always 7, this means the number opposite of 3 has to be 4. Therefore, the correct answer is option 2.

Option 4 "Data insufficient" means that there isn`t enough information in the pictures to determine the answer. It`s not the correct choice here, since we can define the number opposite 3 based on the standard dice rules.