Question

In numbers — 5 8 1 3 2 7 6 4, how many digits are such which are at the same distance from the beginning as I arranged in descending order?
(a) Three
(b) Two
(c) One
(d) None

Also explain the question...
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Answer 1

Answer:

The given number is: 531268947.

Arranging the digits in descending order, we get: 987654321.

We have the following pairs of digits, satisfying the given conditions.

Digits in Given number Digits in Descending order

5 3 1 2 5 4 3 2

3 1 2 6 6 5 4 3

1 2 2 1

1 2 6 8 9 4 7 7 6 5 4 3 2 1

2 6 8 9 4 7 7 6 5 4 3 2

8 9 9 8

9 4 7 9 8 7

Thus, we have 7 such pairs, namely (5, 2), (3, 6), (1,2), (1, 7), (2,7), (8, 9) and (9, 7).

Answer 2

Explanation:

Mathematics is the study of numbers, shapes and patterns. The word comes from the Greek word "μάθημα" (máthema), meaning "science, knowledge, or learning", and is sometimes shortened to maths (in England, Australia, Ireland, and New Zealand) or math (in the United States and Canada). ... Numbers: how things can be counted

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