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Question
How many such pairs of digits are there in the number 132546798 each of which has as many digits between them in the number as when they are arranged in ascending order?
How many such pairs of digits are there in the number 132546798 each of which has as many digits between them in the number as when they are arranged in ascending order?
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Solution
The correct option is A 12
1-6, 1-7, 6-7 ------ (No position change)
4-5, 3-2, 8-9 ------ (Groups)
4-8, 5-9, 3-5, 2-4, 3-9, 2-8 ------- (Realitive position change)
12
1-6, 1-7, 6-7 ------ (No position change)
4-5, 3-2, 8-9 ------ (Groups)
4-8, 5-9, 3-5, 2-4, 3-9, 2-8 ------- (Realitive position change)
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