What is the fewest number of binary digits that are needed in order to represent all possible natural numbers which have five digits when represented as octal numbers?

a) 5

b) 10

**c) 15 **

d) 20

## Archive for Exam 2001 FE (AM)-Thai

## Question 3

## Question 2

Which of the following is equal to the hexadecimal value 2A.4C?

a)2^{5}+2^{3}+2^{1}+2^{–2}+2^{–5}+2^{–6}

**b)2 ^{5}+2^{3}+2^{1}+2^{–1}+2^{–4}+2^{–5}**

c)2

^{6}+2

^{4}+2

^{2}+2

^{–2}+2

^{–5}+2

^{–6}

d)2

^{6}+2

^{4}+2

^{2}+2

^{–1}+2

^{–4}+2

^{–5}

## Question 1

What is the decimal value of the Binary Coded Decimal (BCD) value 100100010101?

a) –277

**b) 915 **

c) 2325

d) 4425