How many six how many natural numbers less than 1000 can be formed from the digits 0,1,2,3,4,5 when a digit may be repeated any numbers of times?
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Step-by-step explanation:
111
222
333
444
555
102
202
302
402
502
120
220
320
420
520
130
230
330
430
530
140
240
340
440
540
150
250
350
450
550
112
113
114
115
221
223
224
225
331
332
334
335
441
442
443
445
551
552
553
554
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