Number System Skills

What is the place value of 5 in the number 6,753?

• 50

• 500

• 6,000

• 5,000

Convert the binary number 1011 to decimal.

• 10

• 1001

• 11

• 101

Simplify the expression (3^2 + 4^2) / (3^2 - 4^2).

• 5/7

• 1/7

• -25/7

• -7/25

If a number is divisible by 9, what is the sum of its digits?

• 15

• 6

• 9

• 12

What is the hexadecimal equivalent of the binary number 1101?

• 42

• 19

• 24

• 35

Find the value of log(base 2) 16.

• 4

• 2

• 12

• 8

What is the place value of 7 in the number 8,749?

• 70

• 700

• 7000

• 7

Convert the octal number 56 to decimal.

• 76

• 36

• 66

• 46

Solve the equation 3x - 5 = 10 for x.

• x = 5

• x = 7

• x = 3

• x = 12

If a number is divisible by 3, what is the sum of its digits?

• The sum of the digits of a number divisible by 3 is always divisible by 3.

• The sum of the digits of a number divisible by 3 is always prime.

• The sum of the digits of a number divisible by 3 is always even.

• The sum of the digits of a number divisible by 3 is always a perfect square.