1.
The value of $$\frac{1}{4}$$ + $$\frac{1}{4 × 5}$$ + $$\frac{1}{4 × 5 × 6}$$   correct to 4 decimal places is :

3.
Vishal donates blood thrice in 2 years-each time 350 ml. How many litres of blood will he donate in 6 years ?

5.
The value of $$\frac{5.71 × 5.71 × 5.71 - 2.79 × 2.79 × 2.79}{5.71 × 5.71 + 5.71 × 2.79 + 2.79 × 2.79}$$       is :

7.
$$\frac{{{{\left( {3.63} \right)}^2} - {{\left( {2.37} \right)}^2}}}{{3.63 + 2.37}}$$    is simplified to :

9.
Solve : 1576 ÷ 45.02 + 23.99 × $$\sqrt {255} $$  = ?

10.
Solve : $${\left( {\frac{{0.05}}{{0.25}} + \frac{{0.25}}{{0.05}}} \right)^3} =\, ?$$

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