Sarthaks Test
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Observe the following : 

1 + 2 – 3 + 4 + 5 – 6 – 7 + 8 – 9 = –5 

Change one ‘–’ sign as ‘+’ sign to get the sum 9.

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1 + 2 – 3 + 4 +5 – 6 + 7 + 8 – 9 = 9

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