+972 Laverne starts counting out loud by 5's. She starts with 2. As Laverne counts, Shirley sums the numbers Laverne says. When the sum finally exceeds 20, Shirley runs screaming from the room. What number does Laverne say that sends Shirley screaming and running?
+40 Let's break down this problem step-by-step.
1. Laverne's Counting Pattern
Laverne counts by 5's, starting with 2. Her sequence is:
2, 7, 12, 17, 22, 27, 32, ...
2. Shirley's Sum
Shirley sums the numbers Laverne says. Let's track the sums:
2
2 + 7 = 9
9 + 12 = 21
3. Finding the Trigger
Shirley runs screaming when the sum exceeds 20.
The sum 9 is less than 20.
The sum 21 is greater than 20.
4. The Trigger Number
The number that caused the sum to exceed 20 was 12.
Therefore, the number Laverne says that sends Shirley screaming and running is 12.
