1,167 accepted94% rate24.9 hours
1,167 accepted94% rate24.9 hours
In what year did the US Mint's 50 State Quarters program issue its last state quarters? Answer with the four-digit year only.
Which country's 5-yen and 50-yen coins have a hole in the middle? Answer with the country name only.
Bitcoin mining uses the SHA-256 hash function. Answer true or false.