Question

The number of uncertain digit/digits in measured length reported as 41.68 units is
(A) One
(B) Two
(C) Four
(D) Eight

Answer 1

We know that in computing, the most significant bit (MSB, also called the high-order bit) is the bit position in a binary number having the greatest value. The MSB is sometimes referred to as the high-order bit or left-most bit due to the convention in positional notation of writing more significant digits further to the left. 0 (zero) is a number, and the numerical digit used to represent that number in numerals. It fulfils a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems.

Complete step by step answer
It should be known that If we are adding or subtracting quantities with uncertainties, we add the absolute uncertainties. If we are multiplying or dividing, you add the relative uncertainties. If we are multiplying by a constant factor, we multiply absolute uncertainties by the same factor, or do nothing to relative uncertainties.
It can be said that significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.
We know that each measured number has only one uncertain digit (the last digit written). It reflects the accuracy of the scale that was used in the measurement.

So, the correct answer is option D.

Note It can be concluded that there are only ten digits, but we can make any numeral we want from them. A numeral is different from a number, because as soon as we write down the number, that writing is called a numeral. Place value is the idea that, depending where a numeral is, it may be worth ones or tens. Significant digits are all the numbers beginning with the leftmost nonzero digit, or beginning with the first digit after the decimal point if there are no nonzero digits to the left of the decimal point, and extending to the right.