Any multiple of 36.
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4 and 9 can go into numbers that are multiples of both 4 and 9, which are their common multiples. The common multiples of 4 and 9 are numbers that are divisible by both 4 and 9 without leaving a remainder. The smallest common multiple of 4 and 9 is 36, so 4 and 9 can go into 36 and any other multiple of 36.
1, 3, 9, 11, 27, 33, 99, 297.
It is a pattern. Go up two numbers, go down two numbers.
Out of the numbers,9, 10, 1, and 4,no number is irrational.Each of these numbers can be written in the form p/q (p,q = Z ; q not equal to 0).9 = 9/1, 10 = 10/1, 1 = 1/1 and 4 = 4/1So, all these numbers are rational. and none of these numbers is 'not a rational number'.
4 and 9
-5