Number Puzzles Practice Problems

Question 1

110, 100,  , 80,  , 60     Rule:

Accepted Answer

110, 100, 90, 80, 70, 60     Rule: Subtract 10 each time

Question 2

75, 100,  , 150,  , 200     Rule:

Accepted Answer

75, 100, 125, 150, 175, 200     Rule: Add 25 each time

Question 3

180, 160,  , 120,  , 80     Rule:

Accepted Answer

180, 160, 140, 120, 100, 80     Rule: Subtract 20 each time

Question 4

40, 60,  , 100,  , 140     Rule:

Accepted Answer

40, 60, 80, 100, 120, 140     Rule: Add 20 each time

Question 5

10, 50,  , 1250,  , 31250     Rule:

Accepted Answer

10, 50, 250, 1250, 6250, 31250     Rule: Multiply by 5 each time

Activities & Puzzles