Number Puzzle
Two numbers add up to 27.
If you double the smaller number and subtract the larger number, the answer is 3.
What are the two numbers?
An inter-species meeting on Mars
100 aliens attended an inter-species meeting on Mars. 76 of them needed breathing apparatus, 52 needed shaded goggles, but 23 aliens didn’t need either. How many aliens needed breathing apparatus goggles?
Let the smaller number be x.
ReplyDeleteLet the larger number be y.
x + y = 27
2x - y = 3
Add the two equations:
x + y + 2x - y = 27 + 3
3x = 30
x = 10
Now substitute into x + y = 27:
10 + y = 27
y = 17
Final Answer:
The two numbers are 10 and 17.