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Proving Rules on Cards
Medium
Created: November 2, 2025
Try These Next
Medium
Confused Bank Teller
When Dorothy went to cash in a cheque, the confused bank teller swapped the dollars and cents. He gave her dollars in place of cents, and cents in place of...
Easy
Two Girlfriends and Two Trains
Unfaithful Bob has two girlfriends Alice and Carol. Bob can take a train ride from the city’s train station to get to them. There is only 1 line going in both...
Easy
Watermelons Drying in The Sun
A farmer is proud of his newest feat: growing a 120 kg watermelon that he wants to enter in the farming contest next week. Using a special sensor, he detects...