73
36
The number is 36.
The sum of any two-digit number and the number formed by reversing the digits is always divisible by 11.Why?The algebraic proof is as follows:(10x+y) + (10y+x) = 11x + 11y = 11(x+y)
No, reversing the order of the digits of a two-digit prime number does not always result in a prime number.
It is easiest to explain with an example. Suppose you have a number 4627. Then the number obtained by reversing [the order of] its digits is 7264. The difference between them is the bigger number minus the smaller number. So here it would be 7264 - 4627 = 2637.
73 7-3 = 4 73 is prime and 37 is prime.
3 and 6
No because as for example 23 is a prime number but 32 is a composite number
03458
A reversible prime is a number such as 37, where reversing the order of the digits gives 73 which is also a prime.
A reversing number is a number. Say 14. You reverse the numbers. Then the number will be 41. That is a reversing number.
The number you are looking for is 12. Reversing the digits gives you 21 75% of 12 is 9 12 + 9 = 21