The squares are skip counting in 2s

Sirrahmina is skip counting in 2's
2,4,6,8,10,12,14,16,18,20

Neta is skip counting in 2's
2,4,6,8,10,12,14,16,18,20

 

To skip count in 2's you say a number and then another number. The first number you say is 2. The next number is 4. You don't say 3! You could skip count in 2's all the way up to 100!

We can be tricky and skip count in 4's!