What Is The Missing Number
Observe the first three sets of numbers to determine the missing value in the fourth set.
Are you sure you know the value?
{5, 23, 22, -6}
{1, 39, 21, -19}
{17, -13, 47, 43}
{-8, 11, ?, 31}
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Fun and accessible problems for younger students or beginners. Posted every Monday, these weekly brain teasers kickstart your week with a mental warm-up.
Observe the first three sets of numbers to determine the missing value in the fourth set.
Are you sure you know the value?
{5, 23, 22, -6}
{1, 39, 21, -19}
{17, -13, 47, 43}
{-8, 11, ?, 31}
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