( ! ) Warning: Undefined array key "answer" in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 26
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0

( ! ) Deprecated: htmlentities(): Passing null to parameter #1 ($string) of type string is deprecated in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 26
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0
2	0.0029	364440	htmlentities( $string = NULL )	.../Method_Ad_Step1C.php:26

You entered which is

( ! ) Warning: Undefined array key "answer" in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 27
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0

wrong. We expected

If you are a human please use your back button and redo the math question.

( ! ) Warning: Undefined array key "attempts" in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 30
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0

( ! ) Warning: Undefined array key "HTTP_REFERER" in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 32
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php:30) in /Users/lowerlevel/Sites/D7036/epamethods/method_ads_copy/Method_Ad_Step1C.php on line 34
Call Stack
#	Time	Memory	Function	Location
1	0.0019	363384	{main}( )	.../Method_Ad_Step1C.php:0
2	0.0032	364608	header( $header = 'Refresh: 20; URL=""' )	.../Method_Ad_Step1C.php:34