The total number of points would be equal to 5n.
You would simply multiply 5 by the amount of questions. In this case, we do not know the amount, so we can use the variable n.
Cost of 6 sweets = 24p
so, cost of 1 sweet = 24p/6 = 4p
Now, cost of 5 sweets will be =4p*5 = 20p
your answer would be that the sematry would be vertical semmetry