What's the purpose of the megathread? I'm so confused what's going on with this community...
In simple English... A number is divisible by 7 if the difference between 2 times the last digit and the remaining digits is divisible by 7.
Examples:
- Is 14 divisible by 7? 4*2=8. 8-1=7. Check.
- Is 28 divisible by 7? 8*2=16. 16-2=14. Check.
- Is 182 divisible by 7? 2*2=4. 18-4=14. Check.
- Is 1323 divisible by 7? 3*2=6. 132-6=126.
- Is 126 divisible by 7? 6*2=12. 12-12=0. Check.
OP, if I have misunderstood your reasoning, please correct me.
Thanks, this is the answer I was looking for. I'm trying to save money because we don't have a lot. My wife is on board with saving, but she hasn't done the math to see where most of our money is going.
I might need to back off a bit. I like to save, but this might be a bit much.
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CaspianXI
joined 1 year ago