Quandaries and Queries 

My son, who is 9 in grade 5 has been asked to convert base 10 numerals into base 5. His first question of: 24(10) he has calculated to be 4x5 + 4x1 = 44 (5) The next question however is the tricky one.Ê We know the answer is supposed to be 100 but we find it difficult to get this in the way he understands it. 25 (10) = _________________ 100 (5) Can you help us figure out how we reach the answer. I've read the other examples you have on the web site but still find it difficult to understand. Thanks, Susy Hi Susy, Imagine that you have 25 items and collect them into groups of 5. You get Another way to say this is 5 divided by 5 is 1 with a remainder of 0 1 divided by 5 is 0 with a remainder of 1. For example to write 32 in base 5 6 divided by 5 is 1 with a remainder of 1 1 divided by 5 is 0 with a remainder of 1. 

