21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39.
All those not less than 20.
and the answer is 2,3,11,13,and 17.
All the prime numbers less than 20 are 2,3,5,7,11,13,17,19
A more formal definition for a number less than 20 could be, "a number x, x < 20" or if you want to express the set of all numbers less than 20 "{x | x < 20}" which is read "the set of all numbers x such that x is less than 20". In interval notation, you can write (-infinity, 20) where "infinity" should be replaced by the infinity symbol.
23 and 29 are the two prime numbers greater than 20 but less than 30.
All those not less than 20.
and the answer is 2,3,11,13,and 17.
The answer is 52.
15
All the prime numbers less than 20 are 2,3,5,7,11,13,17,19
A more formal definition for a number less than 20 could be, "a number x, x < 20" or if you want to express the set of all numbers less than 20 "{x | x < 20}" which is read "the set of all numbers x such that x is less than 20". In interval notation, you can write (-infinity, 20) where "infinity" should be replaced by the infinity symbol.
23 and 29 are the two prime numbers greater than 20 but less than 30.
There are more than one: 25, 36 and 49.
They are: 23+29 = 52
The two numbers that are less than 20 are 1 and 2. However, there are many other numbers less than 20, including 3, 4, and so on, up to 19. If you meant specific numbers or a particular context, please clarify!
To find the two-digit counting numbers less than 30, we consider the numbers from 10 to 29, which gives us 20 two-digit numbers. The multiples of 20 that are two-digit numbers are 20. Since 20 is already included in the count of two-digit numbers less than 30, the total remains 20. Therefore, there are 20 two-digit counting numbers that are either less than 30 or a multiple of 20.
13 and 6