Brain Teasers
Unknown Number Relationship
Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.Series
What single-digit number replaces the "?" below to go in the middle of the following set of numbers?
1, 8, 10, ?, 8, 3, 11
1, 8, 10, ?, 8, 3, 11
Hint
If the "3" is changed to "12", it still works.Answer
9The numbers are sequenced such that when they are spelled out, the last letter of the previous word is the same as the first letter of the word which follows it. So, "nine" (9) fits in the sequence after "ten" (10) and before "eight" (8) as the "missing link", in order to maintain the relationship between each word/number as follows:
one, eight, ten, nine, eight, three, eleven
For clarity:
onE=EighT=TeN=NinE=EighT=ThreE=Eleven
Regarding the hint, if the "3" is changed to "12", the puzzle still works because both "three" (3) and "twelve" (12) start with "t" and end with "e".
And for the title: UnknowN=NumbeR=Relationship
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