The mean of 5 numbers is 18. If one number is excluded, their mean is 16. The excluded number is:
26
Mean of 5 numbers=18
∴ Total=18×5=90
By excluding one number, the mean of remaining 5-1=4 numbers =16
∴ Total=16×4=64
∴ Excluded number = 90 - 64 = 26