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What number is needed to complete the pattern below? 66 73 13 21 52 __ 10 20
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1 vote
What number is needed to complete the pattern below?

66 73 13 21 52 __ 10 20

User Lao
by
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1 Answer

1 vote
Put the numbers in pairs and find the differences.

73-66= 7
21-13= 8
? -52= ?
20-10= 10

The difference should increase by one each time. The missing difference is 9 (7, 8, 9, 10).

? -52= 9
61-52=9

Final answer: 61
User Svrnm
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8.6k points
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