A number consists of two digits, the difference of whose digits is 3. If 4 times the number equals 7 times the number obtained by reversing its digits, find the number.

[Hint. Original number is greater than the number obtained by reversing its digits. ∴ In original number, ten's digit greater than unit's digit.]

When a two-digit number is divided by the sum of its digits, the quotient is 8. On diminishing the ten’s digit by three times the unit’s digit, the remainder obtained is 1. Find the number.