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Naughty Nimble Nines 2 (Posted on 2023-09-27)

Use precisely four 9's, and build an expression that works out to 161.

(I) At least one 9 can be turned upside down to 6.

(II) None of the 9s can be turned around to 6.

See The Solution Submitted by K Sengupta

Rating: 4.0000 (1 votes)

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Quite easy

| Comment 1 of 6

161=81+80.

I. 81=9*9 80=6!/9. so 161=9*9+6!/9

II. 161=9*9+((sqrt9)!)!/9

If concatenation were allowed, symbol &, then

III. 161= (9/9) & (sqrt9)! & !(!(sqrt9))

Edited on September 27, 2023, 8:28 am

Posted by Ady TZIDON on 2023-09-27 08:26:53

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