State true or false:

It is possible to connect all nine dots using only four straight lines. Lines can cross, but you can not lift your pencil off the paper or retrace any line. Clue: Check only dots and empty space

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True

False

answer is A.

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Detailed Solution

Given:

Let us find four straight lines by using 9 dots.
Start to draw a line by choosing one point from four points of the corner.
First we draw a straight line using three points (line 1). The second would be an angle and will intersect the two points (line 2). The third line will go up to straight (line 3). The fourth line will be diagonal and will intersect the remaining points (line 4).
Question Image

Hence, the required figure is as above.
Yes it is possible to connect all 9 dots by using 4 straight lines.
Hence option (1) is the correct answer.

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