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How many positive integers less than 1000 have the sum of their digits equal to 6?

 May 14, 2020
 #1
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0

006

015

024

033

042

051

060

 

105

114

123

132

141

150

 

204

213

222

231

240

 

303

312

321

330

 

402

411

420

 

501

510

 

600

 May 14, 2020

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