5. If the number is above 110,210,310,….910
the method of calculation will be,
Here 115+15 =130 so, in these the first
two digits i.e 1&3 will be post same
and the last digits 0 will be added to
first digits of 15 square i.e 2.
9. EXAMPLE 3
NUMBERS IDEAL NO
FROM 1-9 1
FROM 11-19 2
FROM 21-29 3
FROM 31-39 4
FROM 41-49 5
FROM 51-59 6
FROM 61-69 7
FROM 71-79 8
FROM 81-89 9
FROM 91-99 10 & SO ON