Take the question apart, one step at a time.
The remainder, when the number is divided by 5, is 4. That means that the ones digit is either 4 or 9. However, you know that both digits are odd, which means it has to be 9.
The sum of the digits is 10, so the tens digit has to be 1.
Your number is 19.
19
The number is 19.
64
64
64.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
The number is 19.
1 can be divided into both numbers with no remainder
19.
19.
1 and 2 can go into both without a remainder.
No number can satisfy these conditions: To have a remainder of 1 when divided by 6, the number must be odd (as all multiples of 6 are even and an even number plus 1 is odd) To have a remainder of 2 when divided by 8, the number must be even (as all multiples of 8 are even and an even number plus 2 is even) No number is both odd and even. → No number exists that has a remainder of 1 when divided by 6, and 2 when divided by 8.
The smallest number which can be divided by both 4 and 5 without a remainder is 20. This is also known as the Least Common Multiple (LCM).