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Aim: Catch the white mice

Move the cat with the arrow keys or by tapping in the game area to catch the white mouse. Avoid the red balloons but hit the blue balloons.

Your final score is based on all of that plus number of questions answered right, and the time taken.

Doubling each time
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The CAT AND MOUSE game to practice
'Doubling each time' for 4th grade

Number patterns: double the number each time

This topic focuses on number patterns where each subsequent number is obtained by doubling the previous one. These patterns, known as geometric sequences with a common ratio of 2, are easiest to understand by looking at examples. Let's start by looking at one such number pattern:

1 , 2 , 4 , 8 , _ , _ ...

What comes next? To find out, let's first look at the differences between each pair of consecutive numbers:

  • 2 ÷ 1 = 2
  • 4 ÷ 2 = 2
  • 8 ÷ 4 = 2

You can see that in each step, we multiply the previous number by 2 to get the next number in the sequence. That is because doubling a number is the same as multiplying it by 2. Now, let's use this rule to find the next number:

8 x 2 = 16

So, the next number in the pattern is 16. The sequence now looks like this:

1 , 2 , 4 , 8 , 16 , _ ...

If we do the next number in the sequence, it will be 16 x 2 which is 32,

1 , 2 , 4 , 8 , 16 , 32 ...

To recap, always remember the following steps when identifying the next number in a pattern that doubles the number each time:

  1. Confirm that the ratio between each pair of consecutive numbers is 2 by dividing them.
  2. Multiply the last number in the sequence by this ratio of 2.
  3. That gives you the next number in the sequence.

This topic asks you to work out the next number in the pattern of numbers created by doubling the number each time.

Related topics

With our Cat and mouse math game you will be practicing the topic "Doubling each time" from 4th grade / Pattern / Next number. The math in this game consists of 21 questions that ask you to pick the missing number in these number doubling patterns.

Move the cat to catch the white mice, hit the blue balloons, but avoid the red ones

Large thumbnail for math game Cat and mouse

Cat versus mouse game with added balloons for math and fun. You are the ginger cat, and your life is being made a misery by some white mice which have come into the house and are proving hard to catch. Not to mention there is a mouse house party going on and lots of balloons getting in the way of your hunting.

So you have to catch the white mice, forget about the gray mice, hit the blue balloons but avoid the red balloons, and answer math questions (you are a CLEVER cat...). If it sounds complicated and a bit frantic, that's because it is. Do your best but don't worry if you can't catch all the mice - neither can we. It's a cat's life...

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How to play CAT AND MOUSE to practice
'Doubling each time' for 4th grade

Free Math Games screenshot of the CAT AND MOUSE game for elementary

CAT AND MOUSE is a quirky take on the perennial enmity of ponderous predator and plucky prey. Here are the basics:

  1. Press "PLAY" on the CAT AND MOUSE settings page to open the game.
  2. You are a ginger cat overwhelmed by a serious mouse problem.
  3. Luckily your job is only to catch the white mice, not all the mice.
  4. Trouble is, they are not easy to catch and will try to avoid you.
  5. Use the arrow keys or tap the screen in the direction you want the cat to go.
  6. You will need fast reaction times to catch those white mice, and the balloons keep getting in the way.
  7. Mouse scores are 25 points for each white mouse caught, minus 5 points for each white mouse that escapes.
  8. When you do catch a white mouse, a math question will appear.
  9. Answer the math question correctly for those extra points...
  10. You get 50 points for each correct answer, but you lose 25 points for each wrong answer.
  11. Hitting blue balloons gives you extra points, but 3 hits on a balloon will burst it for that level.
  12. Hitting red balloons takes away points.
  13. Balloon scores are +5 or +10 points for blue balloons, -5 or -10 points for red balloons.
  14. This is a timed game and your final score is calculated by taking away your time in seconds from the points you have earned.
  15. If you get one of the 10 best scores you can add your name to the leaderboard for your chosen topic.
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