Note: This is the Solution of exercise 2.3 from newly published book by PCTB (Punjab Curriculum and Textbook Board, Pakistan) for new 9th session 2025 Onward.
Exercise 2.3
Question # 01: Find characteristic of the following numbers:
\((i)\) \(\quad\) \(5287 \)
\((ii)\) \(\quad\) \(59.28 \)
\((iii)\) \(\quad\) \(0.0567\)
\((iv)\) \(\quad\) \(234.7 \)
\((v)\) \(\quad\)\( 0.000049 \)
\((vi)\) \( \quad\) \(145000 \)
Question 2: Find logarithm of the following numbers:
\((i)\) \(\quad\) \(43 \)
\((ii)\) \(\quad\) \(579\)
\((iii)\) \(\quad\) \(1.982 \)
\((iv)\) \(\quad \)\(0.0876\)
\((v)\) \(\quad\) \(0.047 \)
\((vi)\) \(\quad\) \(0.000354 \)
Question 3: If \(\small{log\ 3.177 = 0.5019 }\), then find:
\((i)\) \(\quad\) \(log\ 3177 \)
\((ii)\) \(\quad\) \(log\ 31.77\)
\((iii)\) \(\quad\) \(log\ 0.03177 \)
Question 3: Find the value of \(x\):
\((i)\) \(\quad\) \(log\ x = 0.0065 \)
\((ii)\) \(\quad\) \(log\ x = 1.192\)
\((iii)\) \(\quad\) \(log\ x = -3.434 \)
\((iv)\) \(\quad \)\(log\ x = – 1.5726\)
\((v)\) \(\quad\) \(log\ x = 4.3561 \)
\((vi)\) \(\quad\) \(log\ x = -2.0184 \)