1. Digital puzzle: Give some numbers and let the students put them together into a new number according to certain rules. For example, given the numbers 2, 3 and 4, students can spell 23, 24, 32, 34, 42, 43 and so on.

2. Digital maze: In a maze, give some numbers and directions, so that students can find the correct path according to the instructions. For example, from the starting point, students should take 2 steps to the right, then 3 steps up, then 1 step to the left, and finally 2 steps down. Students need to find the finish line.

3. Guess the number: Give the students some hints and let them guess a number. For example, if the prompt is "This number is greater than 5 and less than 8", students can guess whether the answer is 6 or 7.

4. Number sorting: Give a set of numbers and let the students arrange them in order from small to large. For example, given the numbers 3, 1, 5 and 2, students can arrange them as 1, 2, 3 and 5.

5. Number comparison: Give two numbers and ask students to compare their sizes. For example, given the numbers 5 and 3, students can compare that 5 is greater than 3.

These interesting questions can help first-grade pupils learn mathematics knowledge in games and cultivate their logical thinking and problem-solving ability. At the same time, these questions can also stimulate students' interest in mathematics and make them participate in mathematics learning more actively.