15. A) I am a number less than 50. When divided by 5, my remainder is 4.

Who am I? B) What are the other possible answers?

A) The number is 49

B) The other possible answers are 9, 14, 19, 24, 29, 34, 39, 44

Step-by-step explanation:

* Lets explain how to solve the problem

- The numbers divisible by five must have unit digits of zero or five

# Ex: 5, 10, 45, 90 numbers divisible by five

- If we need numbers divided by five and have reminder four we will

add 4 to the unit digits zero and five, then the unit digits of these

numbers will be four or nine

# Ex: 9, 14, 49, 94 have remainder four when they divided by five

* Lets solve the problem

- The number is less than 50

∵ The numbers less than 50 and divisible by 5 are:

5, 10, 15, 20, 25, 30, 35, 40, 45

∵ The remainder is 4

- We will add all the numbers above by 4

∴ The numbers that divided by 5 and have a remainder 4 are:

9, 14, 19, 24, 29, 34, 39, 44, 49

A) The number is 49

B) The other numbers are 9, 14, 19, 24, 29, 34, 39, 44