236
29
202, 212, 222, 232, 242, 252, 262, 272, 282, and 292 are the palindromic numbers between 200 and 300. NONE of them are prime, since they must all end in 2 they are even and so are divisible by 2, so they are not prime.
After 5, all prime numbers end with 1, 3, 7 or 9.
No, there are composite numbers that end in every other digit.
There are 100 numbers that end in 0 (10, 20, 30, ..., 1000) and 200 numbers that end in 5 (5, 15, 25, ..., 995). However, numbers that end in both 0 and 5 (multiples of 10) have been counted twice, so we need to subtract these duplicates. There are 100 numbers that end in both 0 and 5 (e.g., 10, 20, ..., 1000), so the total number of numbers that end in 0 or 5 is 100 + 200 - 100 = 200.
10 of them.
236
110
All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.All numbers that end with 5 are divisible by 5.
2, 22.
29
202, 212, 222, 232, 242, 252, 262, 272, 282, and 292 are the palindromic numbers between 200 and 300. NONE of them are prime, since they must all end in 2 they are even and so are divisible by 2, so they are not prime.
After 5, all prime numbers end with 1, 3, 7 or 9.
the numbers never end!
No, there are composite numbers that end in every other digit.
There is no end to the world of numbers!