I need help with these Math Riddles?

Question

1.What makes a monorail a monorail?

2. What is wrong with the naming of the months September, October, November and December?

3. In the Olympic Games the Triathlon has three events, the Pentathlon has five, and the Decathlon has ten. What would you call a contest of seven events?

4. SInce we call a ten-sided shape a decagon, an eight-sided shape an octogon, a six-sided shape an hexagon, and five sided shape a pentagon, can you suggest a different name for a triangle?

5. A centurian was a roman soldier in command of this many soldiers.

6. If a monarchy is 1 one ruler leading a country, what is a tetrarchy?

7. An octahedron is a solid with 8 faces and looks like a diamond. A tetrahedron has 4 triangular faces and looks like a pyramid. A hexahedron has square faces. What would it look like?

8. If a octopus loses 1 leg, what should he be called?

9. How many sides are there on a pentagon?

Thanks any answer will help me.

Answer 1

mono. one rail

they are not numbers seven eight nine and ten, they are 9,10,11,12

septathlon

trigon

100

three rulers

a stop sign, maybe?

a septapus

five

Answer 2

1. it has only one rail
2. thez nothing wrong with the naming- the guy who named them had a brain-jam after august
3. septathlon
4. trigon or "three-corner-gon" or plain tcg
5. 1st of all, its a centurion. he commanded 10 cohorts
6. 4 ruler country bt we all know that cant happen
7. a cube
8. an octopus! if a man loses a leg his name doesnt change does it? what you want to hear is a heptopus
9. 5?

advice:u shd ask shorter questions.

Answer 3

Above answers are correct except:

6) Tetra = 4 I think.
7) 6 faces of squares = a cube

Answer 4

1. it has one rail to travel on
2. sept means 7 and octo means 8 when they are actually the 9 and 10th months
3. a septathon
4. triagon
5. 1000
6. ruled by ten
7. cube
8. and octupus, just cause it lost a leg doesn't change the animal
9. 5