In two digit numbers, how many times does the digit 5 occur in (i)the ten's place (ii)the units place?

How many times does the digit 9 occur between 1 and 100?

The sum of digits of a two digit number is 11. If the digit of ten's place is increased by 5 and the digit at unit's place is decreased by 5 the digit of the number are found to be reversed. Find the origional number.

The digit in the unit's place of (153)^(98) is

One of the two digits of a two digit number is three times the other digit. If you interchange the digits of this two-digit number and add the resulting number to the original number, you get 88. What is the original number?

The ten's digitof a two digit number is three times the unit digit. The sum of the number and the unit digit is 32. Find the number

In a four digit number, the digit in thousand’s place in 4 and the digit in the one’s place is twice that in the thousand’s place. The number has no hundreds. The ten’s place digit is the difference between the digit in the thousand’s place and the hundred’s place. Find the number.

How many 4-digit numbers are there with no digit repeated?

What is the digit in the unit's place of (143)^(86)" ? "

In a two digit number, the unit’s digit is twice the ten’s digit. If 27 is added to the number, the digits interchange their places. Find the number.

How many 3-digit number have exactly one of their digits as 5?