Question

Use what you know about skip counting by 10 to figure out the number of circles shown in the given picture. Identify the option with the correct sequence.

• A. $5,15,25,35,40$
  
• B. $5,10,20,40$
• C. $5,10,15,20,25,30,35,40$
• D. $10,20,30,40$

Answer 1

The correct option is D $10,20,30,40$

Say: Let us find the number of circles by skip counting by 10.

Steps:
$\bullet$ We can see that there are four groups, and each group has 10 circles.
$\bullet$ In order to find the total number of circles, we will skip count by 10s four times.
$\bullet$ Each group has 10 circles.
$\bullet$ So 1 group 1 has 10 circles. 2 groups will have 10 + 10 = 20 circles.
$\bullet$ There will be 30 circles in 3 groups and 40 circles in 4 groups.
$\bullet$ Therefore, the sequence is 10, 20, 30, 40.
$\bullet$ Hence, option B is the correct answer.

WB: If required, use the whiteboard, to draw the circles and skip count by 10s to find the total number as shown.