Why is 90 a divisible by3 or9?

Why is 0 bigger than -1? How many planes of symmetry does the triangular prism have? What operation are you using if your answer is the sum? What are the events that occur at a neuromuscular junction? How do you write 15 cubed in exponential notation? What numbers can you add to make 200? How many pennies is one dollar worth? How many degrees you turn once in a regular hexagon? Why the quotient of two integers is not always an integer? In the song the 12 days of Christmas how many total gifts are given? Is 131 over 84 in simplest form? What is the area of an irregular triangle shape? How would you write ample as an adverb? What is 17.291 rounded to the nearest hundredth? What T is a way of covering the plane with shapes leaving no gaps and in a repetitive pattern? What are the odds of picking 6 numbers out of a possible 20? What are the equivalent fractions for 60 over 84? What is 48 divide by 3? What is the significance of 1111? How do you get a mixed number with a whole number?