Light A and light B are always in opposite on-off states to each other. Light C is always opposite light A. Light D is only on if both light A and light C are on, otherwise it is off. What can be said about these four lights?

Where should parentheses be added to make the following expression true? 1 ÷ 1 + 1 + 1 + 1 ÷ 1 + 1 + 1 + 1 ÷ 1 + 1 + 1 = 1

Solve for x: y(x - 1) = z

((7 * 9) - 1) * 2 + 1 =

If @A = A * 3 + 1, what is @6 ?

A student divided a number by 2/3 when he required to multiply by 3/2. What is the percentage of error in his result.

1/4 + 6/8 =

Complete the series: 1, 2, 4, 8, 16, 32, ...

Complete the series: a, bb, ccc, ...

Which character should you remove to make the two lines identical? h609LP h6092LP

True or False? The following strings are identical. 5834cf32bsd32a 5834cf32bsd32a