Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?
You can make a calculator count for you by any number you choose.
You can count by ones to reach 24. You can count by twos to reach
24. What else can you count by to reach 24?
Find the squares that Froggie skips onto to get to the pumpkin
patch. She starts on 3 and finishes on 30, but she lands only on a
square that has a number 3 more than the square she skips from.
We had lots of correct solutions to this
problem and many of you explained your thinking very clearly. Well
Musab from Orchard School answered the first
part of the problem:
You're right, Musab. What other possibilities
could there have been then? Pupils at St Mary's in Tetbury
approached the second part of the problem in a very logical (or
systematic) way. They said:
PJ, Josh and Michael tried a few things out
and gradually got close to the answer. This can be a very useful
way of solving a problem (we call it trial and improvement):
Qiuying of Wimbledon High School explained the
solution in slightly higher level maths. (Don't worry if you
haven't come across these ideas yet.)