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?
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.
Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?
You can make a calculator count for you by pressing the keys
$1 + = = $
$1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12$
To make it count by twos, press $2 + = = $
$2, 4, 6, 8, 10, 12$
You can make it count by any number you choose.
Now the question:
You can count by ones to reach $24$.
You can count by twos to reach $24$.
What else can you count by to reach $24$?