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If the pattern below is continued, what number will appear directly below 400?
Below 400
Age 14 to 16
ShortChallenge Level 
If the pattern below is continued, what number will appear directly below 400?
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
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16
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If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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