Technically or logically it is possible only once. As if you subtract 5 from 25 at first te result will be 20. Now, you can't subtract 5 from 25 since the left number is 20.
But if you go mathematically, it can be done infinite times and only 5 times without going into the negatives.
Sanmitra walked 8 m towards the north. He turned to his right and walked 16m , then he turned to his left and walked 5 m and again he turned to his left and walked 16 m. In which direction is he from his starting point ?
How many such digits are there in the number 84315269 each of which is as far away from the beginning of the number as when the digits are rearranged in ascending order?
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