Find the rule. Then take one step.
The rule is stated, so there is one intended next term.
Ten questions, with the answers explained. Try them in your head, then open each answer when you're ready.
Play this quiz →QUESTION 1 / 10
Add 4 each time: 3, 7, 11, 15, ... What comes next?
- 21
- 20
- 19
- 18
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19
Adding four to fifteen gives nineteen.
QUESTION 2 / 10
Double each term: 2, 4, 8, 16, ... What comes next?
- 32
- 20
- 24
- 30
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32
Sixteen doubled is thirty-two.
QUESTION 3 / 10
Square consecutive positive integers: 1, 4, 9, 16, ... What comes next?
- 24
- 25
- 20
- 36
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25
The next integer is five, and five squared is twenty-five.
QUESTION 4 / 10
Add the previous two terms: 1, 1, 2, 3, 5, ... What comes next?
- 7
- 10
- 8
- 6
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8
The two previous terms are three and five; their sum is eight.
QUESTION 5 / 10
Subtract 3 each time: 20, 17, 14, 11, ... What comes next?
- 8
- 9
- 7
- 10
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8
Eleven minus three is eight.
QUESTION 6 / 10
Alternate +2 and +5, starting with +2: 1, 3, 8, 10, 15, ... What comes next?
- 18
- 20
- 17
- 16
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17
After the last +5 step, the rule returns to +2.
QUESTION 7 / 10
Use consecutive cubes: 1, 8, 27, 64, ... What comes next?
- 128
- 100
- 125
- 81
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125
The next term is five cubed, which is 125.
QUESTION 8 / 10
Divide by 2 each time: 80, 40, 20, 10, ... What comes next?
- 2
- 8
- 5
- 4
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5
Halving ten gives five.
QUESTION 9 / 10
Move forward two letters each time: A, C, E, G, ... What comes next?
- H
- J
- I
- K
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I
Skipping one letter between terms gives I after G.
QUESTION 10 / 10
Repeat red, blue, green in that order. What color is the eighth item?
- Yellow
- Green
- Blue
- Red
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Blue
Positions 2, 5, and 8 are blue in this repeating cycle.