Click ‘Continue Reading’ to see the correct answer.
The missing number is 21.
Solution:
Every line is a calculation. The numbers to use in the calculation is the
number of corners in the symbols. The number written on each line is equal to
the calculation plus 1.
I.E.
Triangle +
Square = 8
is
3 + 4 = 7 + 1 = 8
So, to find the missing number:
5 × 4 = 20 + 1 = 21
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