State the number of significant figures in each of the following numbers : (i) 2.653 xx 10^4 ,(ii) 0.00368 (iii) 65.3 (iv) 0.368 (v) 0.0300.

State the number of significant figures in each of the following numbe

1.	State the number of significant figures in each of the following numbers : (i) 2.653 xx 10^4 ,(ii) 0.00368 (iii) 65.3 (iv) 0.368 (v) 0.0300.
Answer» Solution :(i) `2.653 XX 10^4` has four significant figures because the EXPONENTIAL term does not ADD to the number of significant figures. (ii) 0.00368 has three significant figures because zeros placed left to the first non-zero DIGIT are insignificant. (iii) 65.3 has three significant figures. (iv) 0.368 has three significant figures. (v) 0.0300 has three significant figures because zeros placed after a non-zero digit are significant.