7850
48.
44
The number must be 42.
The secret number must be a two-digit number greater than 25 and less than 50. Since the tens digit is odd, it can be 3, 5, or 7. However, the sum of the digits must be less than 10, so the only possible tens digit is 3. The units digit can be any number from 0 to 9 that, when added to 3, results in a sum less than 10. Therefore, the secret number is 31.
7850
40
40
that is 42
48.
44
The number must be 42.
56, 55, 54, 53, 52, 51, 50
The secret number must be a two-digit number greater than 25 and less than 50. Since the tens digit is odd, it can be 3, 5, or 7. However, the sum of the digits must be less than 10, so the only possible tens digit is 3. The units digit can be any number from 0 to 9 that, when added to 3, results in a sum less than 10. Therefore, the secret number is 31.
To round a number to its nearest hundreds, we should first check if the tens place of the number is more or less than 50. If it is less than 50, then round it to the previous hundred and if it is more than round it to the next hundred.In the given case, the tens place ( 40 ) is less than 50. So it will be rounded to 500.
There is an infinite number of values between 40 and 50, or between 4/10 and 5/10. Try 45 in the first case, and 9/20 in the second.
The prime numbers between 25 and 50 are : 23 29 31 37 41 43 47However 2 and 4 (which appear in the tens place of 5 of these numbers) are not odd numbers.We are left with 31 and 37.The sum of digits of 37 is 10 which is not less than 10;but the sum of digits of 31 is 4 which is less than 10.So, 31 it is