Q.What is this?
A.No.8.

Q.If No.
1 be put on the left side of the 8, what will it be?
A.81.

Q.If the 1 be put on the right side, then what will it be?
A.18.

Q.If the figure 4 be put before the 1, then what will the number be?
A.418.

Q.
Shift the figure 4, and put it on the left side of the 8, then ask the children to tell the number, the answer is 184.