Pebble Sizes

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Class 6A go on a Geography trip to Eastbourne and investigate the size of pebbles on the beach. Jonnie picks up seven small pebbles and measures their lengths in millimetres. The lengths of the first six pebbles are: 

1, 1, 1, 4, 7, 13 

Assuming that the pattern that you observed above continues to hold, work out the length of Jonnie’s seventh pebble.

Comments

  1. Rithvik31 March 2022 at 16:58

    The pattern is that you add 4 consecutive numbers to get the next number. If we follow this pattern, we get 1 + 4 + 7 + 13 = 25. Now we have our answer, 25.

    ReplyDelete

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