Q3.

What is the value of \(\frac{{5.6 \times 0.36 + 0.42 \times 3.2}}{{0.8 \times 2.1}}?\)

Q4.

What is the value of \(\frac{{{{\left( {1.2} \right)}^3} + {{\left( {0.8} \right)}^3} + {{\left( {0.7} \right)}^3} - 2.016}}{{\left( {1.35} \right)\left[ {{{\left( {1.2} \right)}^2} + {{\left( {0.8} \right)}^2} + {{\left( {0.7} \right)}^2} - 0.96 - 0.84 - 0.56} \right]}}?\)

Q5.

What is the unit digit of (217) ⁴¹³ × (819) ⁵⁴⁷ × (414) ⁶²⁴ × (342) ⁸¹² ?