FAQs

How can I use a captcha like 1+3=4?

Written

Here's a way to set up maths captcha questions in CFv4. These are questions like 1+2 is ??

New version of this tutorial is available here: How to create a calculation security question in Chronoforms8 - ChronoForms8 - FAQs

Use the new Security question feature:
  1. Drag a Security Question element from the Advanced elements group into the Preview box.
  2. Drag a Load Security Question action into the On Load event from the Anti Spam action group.
  3. Drag a Check Security Question action into the On Submit event and move it up to be the first action.
  4. Drag an Event Loop action into the pink On Fail event of the Check Security Question action.
  5. Open the Load Security Question action and copy and paste the list of questions below into the Code box (or use your own).
  6. Save the form and test.

Each time the form is loaded one of the questions will be selected at random and displayed.

Below is a list of 198* simple 'math questions':

Important: you can't use '=' or the HTML Entity for '=' in the question because ChronoForms uses '=' a marker to identify the question and the answer. 'is' (or a translation) will work OK; or you can just use '1 + 1' if you prefer.

*There are all of the x + y, x * y and x - y questions for values of x and y from 1-9 where the answer is > 0.

1 + 1 is=2
2 + 1 is=3
3 + 1 is=4
4 + 1 is=5
5 + 1 is=6
6 + 1 is=7
7 + 1 is=8
8 + 1 is=9
9 + 1 is=10
1 + 2 is=3
2 + 2 is=4
3 + 2 is=5
4 + 2 is=6
5 + 2 is=7
6 + 2 is=8
7 + 2 is=9
8 + 2 is=10
9 + 2 is=11
1 + 3 is=4
2 + 3 is=5
3 + 3 is=6
4 + 3 is=7
5 + 3 is=8
6 + 3 is=9
7 + 3 is=10
8 + 3 is=11
9 + 3 is=12
1 + 4 is=5
2 + 4 is=6
3 + 4 is=7
4 + 4 is=8
5 + 4 is=9
6 + 4 is=10
7 + 4 is=11
8 + 4 is=12
9 + 4 is=13
1 + 5 is=6
2 + 5 is=7
3 + 5 is=8
4 + 5 is=9
5 + 5 is=10
6 + 5 is=11
7 + 5 is=12
8 + 5 is=13
9 + 5 is=14
1 + 6 is=7
2 + 6 is=8
3 + 6 is=9
4 + 6 is=10
5 + 6 is=11
6 + 6 is=12
7 + 6 is=13
8 + 6 is=14
9 + 6 is=15
1 + 7 is=8
2 + 7 is=9
3 + 7 is=10
4 + 7 is=11
5 + 7 is=12
6 + 7 is=13
7 + 7 is=14
8 + 7 is=15
9 + 7 is=16
1 + 8 is=9
2 + 8 is=10
3 + 8 is=11
4 + 8 is=12
5 + 8 is=13
6 + 8 is=14
7 + 8 is=15
8 + 8 is=16
9 + 8 is=17
1 + 9 is=10
2 + 9 is=11
3 + 9 is=12
4 + 9 is=13
5 + 9 is=14
6 + 9 is=15
7 + 9 is=16
8 + 9 is=17
9 + 9 is=18
1 * 1 is=1
2 * 1 is=2
3 * 1 is=3
4 * 1 is=4
5 * 1 is=5
6 * 1 is=6
7 * 1 is=7
8 * 1 is=8
9 * 1 is=9
1 * 2 is=2
2 * 2 is=4
3 * 2 is=6
4 * 2 is=8
5 * 2 is=10
6 * 2 is=12
7 * 2 is=14
8 * 2 is=16
9 * 2 is=18
1 * 3 is=3
2 * 3 is=6
3 * 3 is=9
4 * 3 is=12
5 * 3 is=15
6 * 3 is=18
7 * 3 is=21
8 * 3 is=24
9 * 3 is=27
1 * 4 is=4
2 * 4 is=8
3 * 4 is=12
4 * 4 is=16
5 * 4 is=20
6 * 4 is=24
7 * 4 is=28
8 * 4 is=32
9 * 4 is=36
1 * 5 is=5
2 * 5 is=10
3 * 5 is=15
4 * 5 is=20
5 * 5 is=25
6 * 5 is=30
7 * 5 is=35
8 * 5 is=40
9 * 5 is=45
1 * 6 is=6
2 * 6 is=12
3 * 6 is=18
4 * 6 is=24
5 * 6 is=30
6 * 6 is=36
7 * 6 is=42
8 * 6 is=48
9 * 6 is=54
1 * 7 is=7
2 * 7 is=14
3 * 7 is=21
4 * 7 is=28
5 * 7 is=35
6 * 7 is=42
7 * 7 is=49
8 * 7 is=56
9 * 7 is=63
1 * 8 is=8
2 * 8 is=16
3 * 8 is=24
4 * 8 is=32
5 * 8 is=40
6 * 8 is=48
7 * 8 is=56
8 * 8 is=64
9 * 8 is=72
1 * 9 is=9
2 * 9 is=18
3 * 9 is=27
4 * 9 is=36
5 * 9 is=45
6 * 9 is=54
7 * 9 is=63
8 * 9 is=72
9 * 9 is=81
2 - 1 is=1
3 - 1 is=2
4 - 1 is=3
5 - 1 is=4
6 - 1 is=5
7 - 1 is=6
8 - 1 is=7
9 - 1 is=8
3 - 2 is=1
4 - 2 is=2
5 - 2 is=3
6 - 2 is=4
7 - 2 is=5
8 - 2 is=6
9 - 2 is=7
4 - 3 is=1
5 - 3 is=2
6 - 3 is=3
7 - 3 is=4
8 - 3 is=5
9 - 3 is=6
5 - 4 is=1
6 - 4 is=2
7 - 4 is=3
8 - 4 is=4
9 - 4 is=5
6 - 5 is=1
7 - 5 is=2
8 - 5 is=3
9 - 5 is=4
7 - 6 is=1
8 - 6 is=2
9 - 6 is=3
8 - 7 is=1
9 - 7 is=2
9 - 8 is=1