exam Maths Puzzle Numerical Ability

This question really has me stumped. Can anyone help me?
Thank you very much

Tell which real number corresponds to the situation.
During a month a person withdraws 235 dollar

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exam Other Question

Find formulas for (f(g(x)) if


f(x)={0 if x<0} {2x if 0<=x<=1} {0 if x>1}
and
g(x)={1 if x<0}{x/2 if O<=x<=1}{1 if x>1}
4 groups of numbers
ex.
group 1(1,2,3,4) group 2(1,2,5,6) group 3 (1,2,7,8) group 4 (1,2,3,8)
how many 4 digits number(ex 1278) can be made by picking 1 number from each group?