Skip-counting puzzles

key notes :

Skip counting by:

2’s: 2,4,6,8,10,12,14,16,18,20,22,24,26,28………………………..

3’s: 3,6,9,12,15,18,21,24,27,30,33,36,39,42…………………………

4’s: 4,8,12,16,20,24,28,32,36,40,44,48,52,56…………………..

5’s: 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75………………

10’s: 10,20,30,40,50,60,70,80,90,100…………………..

Learn with an example

➡️ Luke skip-counted by fives, starting at 30. Could he have said the number 80?

  • yes
  • no

We know that Luke started at 30 and skip-counted by fives. We want to find out if he could have said the number 80. Try counting like Luke. Start at 30 and count by fives until you say 80 or go past it.

30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80

Yes, you say 80. Luke could have said 80.

➡️ Laura began at 20. She skip-counted until she got to 35. Could she have been counting by fives?

  • yes
  • no

We know that Laura started at 20 and skip-counted until she got to 35. We want to find out if she could have been counting by fives. Try counting like Laura. Start at 20 and count by fives until you say 35 or go past it.

20, 25, 30, 35

Yes, you say 35. Laura could have been counting by fives.

➡️ Kimi skip-counted, beginning at 25, until she reached 45. Could she be counting by fives?

  • yes
  • no

We know that Kimi started at 25 and skip-counted until she got to 45. We want to find out if she could have been counting by fives. Try counting like Kimi. Start at 25 and count by fives until you say 45 or go past it.

25, 30, 35, 40, 45

Yes, you say 45. Kimi could have been counting by fives.

Let’s practice!