# Number System

**English**

**Math**>

**Decimal numbers**

**Number System**

**Which number system uses a base of 8?**

Octal

Hexadecimal

Binary

Decimal

**What is the equivalent of the decimal number 25 in binary?**

10100

11001

11111

10011

**What is the hexadecimal equivalent of the binary number 101011?**

2B

A5

B2

5A

**What is the decimal equivalent of the octal number 73?**

49

57

83

115

**What is the binary equivalent of the decimal number 16?**

10000

10100

11000

11111

**What is the octal equivalent of the binary number 1101101?**

155

215

255

325

**What is the hexadecimal equivalent of the decimal number 1024?**

400

500

600

800

**What is the decimal equivalent of the binary number 11011110?**

205

214

225

236

**What is the binary equivalent of the octal number 67?**

110011

101101

111001

100111

**What is the octal equivalent of the decimal number 4096?**

10000

20000

40000

80000