1. (17)3.5 x (17)? = 178
2. $$\eqalign{
& {\text{If}}\,{\left( {\frac{a}{b}} \right)^{x - 1}} = {\left( {\frac{b}{a}} \right)^{x - 3}}, \cr
& {\text{then}}\,{\text{the}}\,{\text{value}}\,{\text{of}}\,x\,{\text{is}} \cr} $$
3. Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:
4. If 5a = 3125, then the value of 5(a - 3) is:
5. If 3(x - y) = 27 and 3(x + y) = 243, then x is equal to:
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