1. $${\text{Evalute}}:\frac{{{{\left( {2.39} \right)}^2} - {{\left( {1.61} \right)}^2}}}{{2.39 - 1.61}}$$
2. What decimal of an hour is a second ?
3. $${\text{The}}\,{\text{value}}\,{\text{of}}\,\frac{{{{\left( {0.96} \right)}^3} - {{\left( {0.1} \right)}^3}}}{{{{\left( {0.96} \right)}^2} + 0.096 + {{\left( {0.1} \right)}^2}}}\,{\text{is}}:$$
4. $$\eqalign{
& {\text{The}}\,{\text{value}}\,{\text{of}} \cr
& \frac{{0.1 \times 0.1 \times 0.1 + 0.02 \times 0.02 \times 0.02}}{{0.2 \times 0.2 \times 0.2 + 0.04 \times 0.04 \times 0.04}}\,\text{is}: \cr} $$
5. If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?
6. When 0.232323..... is converted into a fraction, then the result is:
7. $$\frac{{.009}}{?} = .01$$
8. The expression (11.98 × 11.98 + 11.98 × X + 0.02 × 0.02) will be a perfect square for X equal to:
9. $$\frac{{\left( {0.1667} \right)\left( {0.8333} \right)\left( {0.3333} \right)}}{{\left( {0.2222} \right)\left( {0.6667} \right)\left( {0.1250} \right)}}$$ is approximately equal to:
10. 3889 + 12.952 - ? = 3854.002
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