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Some non-mathematical puzzles!!! Use your mind!!!

Prove the following just by drawing a single line:

5 + 5 + 5 = 550 [You cannot use the line on equality.]

THE EASY ONE - Use a number 3 times and addition sign(s) to get the number 60. You cannot use 20.


Another EASY ONE - Use the following only once to make an equation-

2, 3, 4, 5, = , +.

Note by Kartik Sharma
3 years, 2 months ago

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Question 1

\(5 + 545 = 550\)

Question 2

\(5 + 55 = 60\)

Question 3

\(4 + 5 = 3^2\)

Am I right?

Sharky Kesa - 3 years, 2 months ago

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solution to question 3 should be 4 + 5 = 3^2

otherwise you are absolutely correct!!!

You cannot use even "+" sign more than once!!!

Kartik Sharma - 3 years, 2 months ago

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Oh, then what you said.

Sharky Kesa - 3 years, 2 months ago

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@Sharky Kesa sorry?

Kartik Sharma - 3 years, 2 months ago

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Question 3:

4+5=3²

Question 1: Is this possible?

5 + 5 4 5 = 550 (draw a line through the plus sign to make it a four)

Prakriti Bansal - 3 years, 2 months ago

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Yeah, that's correct!!!

Kartik Sharma - 3 years, 2 months ago

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or \(2+5=3+4\)

Mathh Mathh - 3 years, 2 months ago

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But I think that you can only use the addition sign once.

Prakriti Bansal - 3 years, 2 months ago

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@Prakriti Bansal yeah. sorry, missed where he said 'only once'.

Mathh Mathh - 3 years, 2 months ago

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Not sure if they the correct answer,

Question 2 :, using \(5\) three times, \[.\] \[55+5=60\] \[.\]\[.\] Question 1 : draw the line on the equal sign, consequently the equation becomes an inequality \[.\] \[5+5+5\neq550\]

Tasmeem Reza - 3 years, 2 months ago

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by the way, solution to Q2 is correct!!!

Kartik Sharma - 3 years, 2 months ago

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oh, didn't I say that you cannot use that inequality sign?

Kartik Sharma - 3 years, 2 months ago

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You said nothing, you only told us to draw some line and he drew the line on the equality sign. There's nothing wrong with that, so if you don't like this solution, you'll have to change the problem a bit (add some constraints, e.g. 'you can't use the line on the equality sign').

Mathh Mathh - 3 years, 2 months ago

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@Mathh Mathh I have added. Thanks!

Kartik Sharma - 3 years, 2 months ago

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Answers will be posted on 1st August!!

Kartik Sharma - 3 years, 2 months ago

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Ah! You solved them all. So, no answers I can post today!! ;)

Kartik Sharma - 3 years, 2 months ago

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