maths Maths Puzzle

You have a piece of paper, 10cm by 10cm. Area = 100cm^2. For some reason, you need a square piece of paper with an area of 50cm^2. Using the paper you have, what's an easy way of getting the new square?

Read Solution (Total 2)

fold the paper such that one side is 5cm.other side is 10cm so area =50cm^2
11 years agoHelpfull: Yes(0) No(3)

by folding the paper n leaving a border of 2.5 cm on 3 sides ,left right n bottom we will get a square of side 5 cm
11 years agoHelpfull: Yes(0) No(0)

maths Other Question

Ms. Arroyo asked the class to see if they could find the sum of the first 50 odd numbers. As everyone settled down to their addition, Terry ran to her and said, "The sum is 2,500." Ms. Arroyo thought, "Lucky guess," and gave him the task of finding the sum of the first 75 odd numbers. Within 20 seconds, Terry was back with the correct answer of 5,625.

How does Terry find the sum so quickly? Q. When an antenna of input resistance 73 ohm is connected to a 50-ohm line and if the losses are ignored then its efficiency will be nearly