Mathigo

Find the rule in a number sequence · fill every blank

Find the pattern

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Pattern settings

One pattern per round. Easy hides one or two blanks in the second half. Hard hides two blanks anywhere.

Pattern

Difficulty

Questions

Timer

Steps

  1. Choose the pattern, easy or hard, how many questions, and whether to show elapsed time.
  2. Press Start to find the pattern. A sequence appears with one or two blanks.

Answer

Type a number and press Enter. With two blanks, Enter moves to the next blank, then checks the last one. The number pad and the keyboard both type, and Backspace deletes.

Notes

At least three numbers stay visible, so the rule can be worked out. A wrong blank clears and a correct one stays. Find the pattern moves on only when every blank is right.

Using the hint

On a find the pattern question, ? shows the rule you picked, such as counting up by 1 or doubling. It does not fill the blanks. Press it again to hide the rule.

What is find the pattern?

Find the pattern gives you a row of numbers with a rule hiding in it, and a few places left blank. Read the numbers you can still see, work out how they change, and fill every blank.

Each find the pattern round uses one kind of sequence, and every question in the set stays on that kind. The choices are counting up or down, even numbers, odd numbers, skip counting by 5 or by 10, doubling, a short group that repeats, two patterns taking turns, or a gap that grows by one each step.

How it works

  1. Choose the pattern, easy or hard, how many questions, and whether to show elapsed time.
  2. Press Start. A sequence appears with one or two blanks.
  3. Type a number and press Enter. With two blanks, Enter moves to the next blank, then checks the last one.
  4. Finish a round of find the pattern to see accuracy and median time. Retry the ones missed on the first try, or start again.

Features

One pattern per round. Every question in find the pattern stays on that rule, so you can notice it and then use it, instead of guessing a new one on every question.

Easy rounds use smaller numbers and hide one or two of them in the second half of the sequence. Hard rounds use larger numbers and hide two numbers anywhere, including right next to each other.

Type each missing number, then check. A wrong blank clears so you can try again. A correct one stays put. The next question appears only when every blank on this one is right.

Tips

  • To find the pattern, start with count up or even numbers. Once those feel obvious, move on to repeating groups, two patterns taking turns, and a gap that grows.
  • Read the numbers that are still showing before you fill a blank. At least three stay visible, which is enough to work the rule out.
  • Retry missed replays the same sequences you missed on the first try. It does not change which facts show up in regular skill practice.