Crux Mathematicorum 2015.
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Problem 3960
Problem 4001
Problem 4002
Problem 4003
Problem 4004
Problem 4005
Problem 4006
Problem 4007
Problem 4008
Problem 4009
Problem 4010
Problem 4021
Problem 4022
Problem 4023
Problem 4024
Problem 4025
Problem 4026
Problem 4027
Problem 4028
Problem 4029
Problem 4030
Problem 4031
Problem 4032
Problem 4033
Problem 4034
Problem 4035
Problem 4036
Problem 4037
Problem 4038
Problem 4039
Problem 4040
Problem 4041
Problem 4042
Problem 4043
Problem 4044
Problem 4045
Problem 4046
Problem 4047
Problem 4048
Problem 4049
Problem 4050
Problem 4051
Problem 4052
Problem 4053
Problem 4054
Problem 4055
Problem 4056
Problem 4057
Problem 4058
Problem 4059
Problem 4060
Problem 4061
Problem 4062
Problem 4063
Problem 4064
Problem 4065
Problem 4066
Problem 4067
Problem 4068
Problem 4069
Problem 4070
Problem 4071
Problem 4072
Problem 4073
Problem 4074
Problem 4075
Problem 4076
Problem 4077
Problem 4078
Problem 4079
Problem 4080
Problem 4081
Problem 4082
Problem 4083
Problem 4084
Problem 4085
Problem 4086
Problem 4087
Problem 4088
Problem 4089
Problem 4090
Problem 4091
Problem 4092
Problem 4093
Problem 4094
Problem 4095
Problem 4096
Problem 4097
Problem 4098
Problem 4099
Problem 4100