Question

All the 4 digit numbers with the same digits as 2011 are written in a row in ascending order. What is the difference between the two numbers that are next to 2011?

A) 890 B) 891 C) 900 D) 909 E) 990

Answer 1

Given : All the 4 digit numbers with the same digits as 2011 are written in a row in ascending order.

To Find : the difference between the two numbers that are adjacent  to 2011?

A) 890 B) 891 C) 900 D) 909 E) 990

Solution :

20 11

has 4 Digits    1 is repeated  

0 can not be  1st digit as 4 digit number

Hence  3 * 3! /2 ! =  9

1012  , 1021  , 1102 , 1120  , 1201 , 1210  , 2011 , 2101 , 2110  

Adjacent numbers  to 2011 are

1210  and 2101

Difference = 2101 - 1210  = 891

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Answer 2

Answer:

891

Step-by-step explanation:

2011-1210=891

b) 891