Well all u have to do is 156%*70= 109.2 so N= 109.2
2 feet I think, I could be wrong
We could do it with algebra. But we can also do it the long way, which is
shorter than the algebraic way.
The digit in the tens place is 3 times the digit in the units place.
So the number MUST be
31, or
62, or
93 .
It can't be anything else.
Now here they are again, with the reverse of each one:
31 . . . 13 The new number is 18 less.
62 . . . 26 The new number is 36 less.
93 . . . 39 The new number is 54 less.
Obviously, the original number is 62.
ANSWER
1001
EXPLANATION
The sum of the first n - natural numbers is
The sum of the first 1000 terms is
The sum of the first 1001 terms is
The difference is
