110
19/91, 28/82, 37/73, 46/64, 55. Isn't that easy?
Assuming you mean digits and not didgets, the answer is 6.
36
20 number
67
add numbers below to each number at the top
Assuming you mean digits and not didgets, the answer is 6.
36
5 odd numbers CAN'T add up to an even number like 50
139
There are a variety of three digits that add up to 25. Examples include 9, 8 and 8.
Multiples of 3 are easy to identify. Their digits add up to a multiple of 3.
20 number
17
51
Since we are talking for the sum of digits, then we are talking about 2-digit numbers between 1 and 100, which are 90 numbers (10 to 99). From these numbers only half of them satisfy the above condition, that is 45 numbers. So 50% of 2-digit numbers between 1 and 100 have an odd sum of their digits.
67
None. The only way for it to be possible would be 3 zeros which is not considered a 3 digit numbers.