Mystery Number Skype

We had our first Mystery Number Skype this morning during math workshop.  We skyped with Ms. Larose's class at Porters Point School.
Ms. Larose's class was trying to figure out our mystery number.Our mystery number was 81. To figure out Ms. Larose's mystery number we asked a variety of yes/no questions. Some of the questions we asked were:

Is your number odd?

Is your number greater than 50?

Is your number a multiple of 5?

Does your number have a 9 in the ones place value?

Does your number have a 3 in the tens place value?

Every student had a 100s chart and marked off numbers on their hundreds chart when Ms. Larose’s class answered one of our questions. After a lot of hard work and collaboration we figured out Ms. Larose's class mystery number was 59! We are planning on scheduling more mystery number skypes this year! 

Answering a skype question