How to remove columns from a text file

Problem

I want to remove the 1st and the 5th columns of a text file of tab separated values. The file is as follows:

       
HEAD1 HEAD2 HEAD3 HEAD4 HEAD5 HEAD6
1.0   -3    3.4   2     7     9
-100  -30   -1    0     -80   7
70    7     8     0     3     0
71    4.5   2.1   0.6   37    4

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