Mode is the most popular value.
2, 4, 3, 2, 5 - Here the number '2' is repeated maximum number of times (2 times). Therefore, the value of mode is 2.
54, 56, 59, 54 - Here the number '54' is repeated maximum number of times (2 times). Therefore, the value of mode is 54.
1, 1, 4, 5, 1, 1 - Here the number '1' is repeated maximum number of times (4 times). Therefore, the value of mode is 1.
10. 20, 10, 40 - Here the number '10' is repeated maximum number of times (2 times). Therefore, the value of mode is 10.