Forms: Math Option not displayed

AvH_Montreal  Hi after much confusion I have figured out why some forms have the math option and others dont as i was trying to add an Add "Other" option and it wasn't appearing on my current form except the last one i did it was there. I noticed that my old form doesn't have the math option. I realised that one you click the green button in forms there is an arrow next to it. I just assumed new quiz meant new form i didn't realise there was two different ones. So the Quiz option has the Maths option but doesn't have Add "Other" option but when you click the arrow it gives you the option of Forms which doesn't have the math option but does have the Add "Other" option. Think it is so silly that the features aren't consistent across the formats and not clear about what formats get what but really they should be available to both.