Maths Questions

Here are the questions for this fortnight. Please email ryan.matchett@cg.catholic.edu.au with your responses. 

K-2

If you have ten counters numbered 1-10, how many can you put into pairs that add to 10? Show me how you got the answers.

3-6

After a party there were some glasses to wash. There are fewer than 150 glasses in total. When lined up in pairs, there was one left over. When lined up in threes, there were two left over. When lined up in fours, there were three left over. When lined up in fives, there were four left over. When lined up in sixes, there were five left over. When they were arranged in sevens there were none left over. 

How many glasses were there?