In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question? 550 x 22 - 24 + 3 = ?
The weights of 4 boxes are 20, 30, 50 and 70 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?
A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series. nephew, anther, tenses, prunes, preens, ?