- Express into scientific form :
(a) 6530 (b) 60 831 (c) 0 000245 (d) 37500000
(e) 0 00000014
- Express in the form of ordinary decimals :
(a) 105 (b) 10 ^5 (c) 2 53 u 104 (d) 9 813 u 10 ^3
(e) 3 12 u 10 ^5
- Find the characteristic of common logarithm of the following numbers (without
using calculator) :
(a) 4820 (b) 72 245 (c) 1 734 (d) 0 045
(e) 0 000036
- Find the characteristic and mantissa of the common logarithm of the following
numbers by using calculator :
(a) 27 (b) 63 147 (c) 1 405 (d) 0 0456
(e) 0 000673
- Find the common logarithm of the product/quotient (approximate value upto
five decimal places) :
(a) 5 34 u 8 7 (b) 0 79 u 0 56 (c) 22 2642 y 3 42
(d) 0 19926 y 32 4
- If log 2 0 30103 ,log 3 0 47712 and log 7 0 84510 , find the value of the
following expressions :
(a)log 9 (b) log 28 (c) log 42
- Given, x 1000 andy 0 0625
a. Expressx in the form anbn, where a and bare prime numbers.
b. Express the product of x and y in scientific form.
c. Find the characteristic and mantissa of the common logarithm of xy.
