general Maths Puzzle

Make a Number 75, By using only four 4s and operators like + - * / ( ) ^ SQRT ! and !! only

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general Other Question

Using only four 4s (compulsory use all 4s) and operators like + - * / ( ) ^ . SQRT ! and !!, make a number 55 Jack speaks the truth in 3/4 the cases and Jill lies in 1/5th cases. What is the
percentage of cases in which both Jack and Jill contradict each other in stating a
fact? (the answers can only be “yes” or “no”).
(a) 60% (b) 35% (c) 20% (d) 15%