99 ofcourse
198 is.
A two-digit positive integer ranges from 10 to 99. It consists of a tens digit and a units digit, with the tens digit being at least 1. Thus, there are a total of 90 two-digit positive integers.
15
The answer is a negative or positive integer with one or two digits.
Every integer apart from 0, has two pieces of information: its distance from 0, and its direction from 0. So it has its value and its sign. So you have a positive and negative for each integer. So the digit 2 can be positive 2 or negative 2 for example.
198 is.
A two-digit positive integer ranges from 10 to 99. It consists of a tens digit and a units digit, with the tens digit being at least 1. Thus, there are a total of 90 two-digit positive integers.
10,11,12...97,98,99
15
This is a one or two digit positive integer.
The answer is a negative or positive integer with one or two digits.
997
Every integer apart from 0, has two pieces of information: its distance from 0, and its direction from 0. So it has its value and its sign. So you have a positive and negative for each integer. So the digit 2 can be positive 2 or negative 2 for example.
The first 3 digit integer being a positive multiple of 30 is 120. The final 3 digit integer being a positive multiple of 30 is 990. 990 - 120 = 870. 870 ÷ 30 = 29 But, as 29 is the difference between the two limits and the limits themselves are included then there are 29 + 1 = 30 such numbers.
9797 is the largest two digit prime number.
99
10