Minimum number of valves!

Each “Y” connection has three valves. Open the minimum number of valves to allow water to flow from the hydrant to the hose. At the beginning, all valves are closed.

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Answer:

Speed and Visual Test: How many circles?

In 30 seconds, try to detect how many circles are located in the following figure!

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Answer:


20 Circles

IQ Test: Odd Out!

Which one of these shapes does not belong with the rest?

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Answer:
D
Only in Shape D, opposite lines are not equal.

IQ Test: Which figure?

Which figure should replace the question mark?

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Answer:


C