What’s the next #
Counterexamples
Conjecture?
next time?
Randoms
100

4,6,8,10,12,...

14 is the next number

100

The sum of two odd numbers is an odd number

Any even number will make this statement false because all odd numbers equal an even number

100

2,4,6,8

Add two each times 2

100

11:00,11:30,12:00,12:30,...

1:00

Add 30 mins

100

Find the next term...

1,3,7,13,..

21 

200

-5,10,-20,40,...

-80 is the next number 

200

If AD=DB, then D is the midpoint of segment AB

When A,B, and D are noncollinear, the conjecture is false. In a triangle, AD=DB, but D is not the midpoint of the line

200

900,300,100

Divided by 3 each time 

200

9:15,10:00,10:45,11:30,...

12:15 

Add 45 mins every time

200

Find the next term

7,8,11,16,...

23

300

3,3,6,9,...

15 is the next number

300

If angle ABC is equal to angle DBE, Then angle ABC are verticle angles.

False

300

90,180,270,360

Add 90 each time

300

9:30,10:45,12:00,...

1:15 

Add 1 hr 15 mis each time

300
What’s the conjecture


5,25,125,625


Multiply by 5 times each time 

400

2,6,14,30,...

62 is the next number

400

If K is a real number, then K> K 

When K is 1 the conjecture is false because 1 isn’t greater than 1

400

328,303,278,253

Subtract 25 each time

400

3:33,3:40,3:57,...

4:14

Add 17 mins

400

What’s the conjecture 

100,87,74,61

Subtract 13 each time

500

1,2,4,7,11,...

16 is the next number

500

  If A is a real number, then -A is a negative number 

0

500

 21,84,366,1344

Multiply by 4 each time

500

 5:17,6:36,6:45,...

8:04

Add hour and 19 mins every time

500

Is this true or false 

Multiply by 2 each time 10, 15, 20, 25 

false