IQ Test Series #2

Insert the correct mathematical signs between each number in order to resolve the equation. What are the signs?

Here is an usual safe. Each of the buttons must be pressed only once in the correct order to open it. The last button is marked F. The number of moves and the direction is marked on each button. Thus 1i would mean one move in, whilst 1o would mean one move out. 1c would mean one move clockwise and 1a would mean one move anti-clockwise. Which button is the first you must press?

Which of the numbers should logically replace the question mark in the octagon?

Which number is missing from this series?

Which of the constructed boxes can be made from the pattern?

Start at 1 and move from box to touching box. Collect four numbers each time. How many different routes are there to collect 11? A reversed route counts twice.

Which square's content matches D1?

Discover the connection between the letters and the numbers. Which of the numbers will replace the question mark?

Scales one and two in perfect balance. Which are these pans should replace the empty one?

Which of the boxes should be used to replace the question mark?

Which triangle continues this series?