1.

Five digit numbers are formed such that either all the digits are even or all the digits are odd. If no digit is allowed to be repeated in one number find the difference between the maximum possible number with odd digits and the minimum possible number with even digits(a) 77063 (b) 79999 (c) 72841 (d) 86420

Answer»

(a) 77063

Maximum possible number with odd digits = 97531 and the minimum possible number with even digits = 20468. 

\(\therefore\) Required difference = 97531 – 20468 = 77063



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