 Hi and welcome to the session. Let us discuss the following question. Question says, find the values of the letters in the following and give reasons for the steps involved. Let us now start with the solution. First of all we will rewrite the given puzzle. It is 3a plus 25 gives p2. Now we need to find the value of two letters that is a and b. Now one digit of the sum a plus 5 is 2 in one's column. Now clearly you can see here in the one's column sum of a and 5 has the unit's digit as 2. Or we can say one's digit. Now this is possible when value of a is 7. We know that 7 plus 5 is 12 and one's digit of 12 is 2. Now 10's digit of 12 that is 1 is carry in the 10's column. Now we can write for a equal to 7 sum a plus 5 is 12. Now we can write 10's digit of 12 that is 1 is carry in the 10's column. Now adding 3, 2 and carry 1 we get 6 and we know that sum of 3, 2 and carry that is 1 is equal to b. So we can write since 1 plus 3 plus 2 is equal to 6 so b is equal to 6. So we can solve the puzzle as 37 plus 25 gives 62. So required value of a is 7 and required value of b is 6. So this is our required answer. This completes the session. Hope you understood the solution. Take care and have a nice day.