Question -
Answer -
(i) 
Least precise number of calculation = 0.112
Number of significant figures in the answer
= Number of significant figures in the least precisenumber
= 3
(ii) 5 × 5.364
Least precise number of calculation = 5.364
Number of significant figures in the answer = Number ofsignificant figures in 5.364
= 4
(iii) 0.0125 + 0.7864 + 0.0215
Since the least number of decimal places in each term isfour, the number of significant figures in the answer is also 4.