Question

Dr. Crypto has 15 lollipops. If he continues buying 10 lollipops a day for the next 8 days, how many lollipops will he have?

• A. 80 lollipops
  
• B. 85 lollipops
  
• C. 90 lollipops
  
• D. 95 lollipops
  

Answer 1

The correct option is D 95 lollipops


Say: Let us skip count to find the total number of lollipops.

Steps:
$\bullet$ We know that Dr. Crypto buys 15 lollipops on the first day.
$\bullet$ In order to find the number of lollipops he will have after 8 days, we will skip count by 10s eight times.
$\bullet$ So, on Day 1, he will have $15+10=25$ lollipops, on Day 2, he will have $25+10=35$, on Day 3, he will have $35+10=45.$
$\bullet$ Similarly, on Day 4, he will have 55, then $65,75,85,95.$
$\bullet$ So, Dr. Crypto will have 95 lollipops after 8 days.
$\bullet$ Hence, option C is the correct answer.

WB: If required, use the whiteboard to find the total number of coins as shown.