### Learning Math and Coding with Robots                                         Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background: #### Robot 1  Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2  Initial Position: ( in, in) Initial Angle: deg Current Position: (6 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 3  Initial Position: ( in, in) Initial Angle: deg Current Position: (12 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4  Initial Position: ( in, in) Initial Angle: deg Current Position: (18 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Arithmetic Sequence Challenge
Problem Statement:

Run the program and find the pattern for the sequence of numbers. Use the pattern to find the fourth number in the sequence.

```/* Code generated by RoboBlockly v2.0 */
/* Problem Statement:
Run the program and find the pattern for the sequence of
numbers. Use the pattern to find the fourth number in the
sequence.*/
#include <chplot.h>
double n;
CPlot plot;
int count;
int count2;

// This is a sample solution
printf("Please complete the sequence:  20, 5, -10, ___  . The 4th number is -25.");
printf("The numbers of stars will appear in order of the sequence. If the number is negative, it will be hexagons.");
for(i = 0; i <= 3; i++) {
//plot.backgroundImage("stars.png");
n = 20 + -15 * i;
if (n >= 0) {
count = 0;
while(count < n) {
plot.strokeColor(randcolor());
plot.star(randdouble(-12, 24), randdouble(-12, 24), 1.5, 0);
count = count + 1;
}
}
else {
double repeat_end = abs(n);
count2 = 0;
while(count2 < repeat_end) {
plot.strokeColor(randcolor());
plot.regularPolygon(randdouble(-12, 24), randdouble(-12, 24), 5, 1, 30);
count2 = count2 + 1;
}
}
delaySeconds(1);
}
plot.strokeColor("yellow");
plot.text("You are correct! Well done!", PLOT_TEXT_LEFT, -6, 8);

plot.label(PLOT_AXIS_XY, "");
plot.grid(PLOT_OFF);
plot.tics(PLOT_AXIS_XY, PLOT_OFF);
plot.axis(PLOT_AXIS_XY, PLOT_OFF);
plot.axisRange(PLOT_AXIS_XY, -12, 24);
plot.ticsRange(PLOT_AXIS_XY, 6);
plot.sizeRatio(1);
plot.plotting();```
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Problem Statement:

Run the program and find the pattern for the sequence of numbers. Use the pattern to find the fourth number in the sequence. Time