35 + 18 = 53
25
19
The answer is 39. 3+9=12, 3x9=27. 12+27=39.
A two digit number whose two digits added together equal 42 and multiplied together equal 82
The no. is 35.
45
35 + 18 = 53
100000 2847239582
38
No. To find if a number is a factor of 3, add the number's digits. If the resulting number is a multiple of 3, then the original number is a multiple of 3. In 4339, the digits of the number added together is 19, which is not a multiple of 3.
25
19
Yes it is - the answer is 58. To check if a number is divisible by 3, add all the digits together. If the sum of the digits will divide by 3 exactly - then so will the original number. In this case, the digits added total 12. The rule also works when dividing by 9 (but the digits must total nine, not three obviously !)
Nope - 1038 is an even number and thus is divisible by 2. Its digits added together total 12 - which is divisible by 3... therefore the original number is also divisible by 3 !!
In a measurement the digits that are an approximation are only those in proper scientific notation. The more digits that are added to the number the more the number becomes exact.
Five