Question

Use squares, square roots and reciprocals tables only to evaluate;   
       3       +       4     
√(42.15)      (3.152)²

Answer 1

√(42.15)=6.4923
3.152² = 9.9351
    3       +      4    
6.4923      9.9351 
3 x 0.1540 + 4 x 0.1007
0.462 + 0.4028
= 0.8648