Maligayang pagdating sa Imhr.ca, kung saan maaari kang makakuha ng mga sagot mula sa mga eksperto nang mabilis at tumpak. Itanong ang iyong mga katanungan at makakuha ng eksaktong sagot mula sa mga propesyonal na may malawak na karanasan sa iba't ibang larangan. Tuklasin ang detalyadong mga sagot sa iyong mga tanong mula sa isang malawak na network ng mga eksperto sa aming komprehensibong Q&A platform.

i am a 3-digit number. all three digits are different. my first and second digits are multiples of 3. my third digit is greater than 3. the sum of my first two digits is 7 more than the third digit. iam not a multiple of 5. what number am i?

Sagot :

"My first and second digits are multiples of 3"
So there first and second digit maybe one of the following: 3, 6, 9

"The sum of my first two digits is 7 more than the third digit"
"D1 + D2 = 7 + D3"

"Not a multiple of 5"
means it is not ending with "5" or "0"

If D1 = 6
If D2 = 9
D3 = ?
"6 + 9 = 7 + x"
NOTE: x = digit no. 3

15 = 7 + x
15 - 7 = 7 - 7 + x
8 = x

The number is:
698

3 digit number - CHECK
3 digits are different - CHECK
1st and 2nd digit is multiple of 3 - CHECK
3rd digit is greater than 3 - CHECK
The sum of my first two digits is 7 more than the third digit - CHECK
( 6 + 9 = 7 + 8) 
(15 = 15)
Not a multiple of 5 - CHECK

So therefore, the number is 698, it can also be 968 as well. 

I get it by combining some multiples of 3 (3, 6, and 9,) and I come up with 6 and 9 MATCHING ALL THE REQUIREMENTS.
I tried 3 and 6, 3 and 9, but they failed. 
:)