Logic

Operator Search

Addition and subtraction only - Operator Search

         

1    2    4    8<0 1 \; \square \; 2 \; \square \; 4 \; \square \; 8 < 0

Which of the following series of signs are appropriate for the three boxes above?

If you fill in the blanks with ++ and/or - only, how many ++ do you need to use to make this equation true?

2    5    6    7=10 2 \; \square \; 5 \; \square \; 6 \; \square \; 7 = 10

1    1    1    11 \; \square \; 1 \; \square \; 1 \; \square \; 1

If we fill in the above blanks using only the operators ++ and/or -, which of the following cannot \color{#D61F06} { \text{cannot} } be a resultant number?

9    7    5    39 \; \square \; 7 \; \square \; 5 \; \square \; 3

If we fill in the above blanks using only the operators ++ and/or -, the resultant number will always be an __________\text{\_\_\_\_\_\_\_\_\_\_} .

2    3    3    6=2 2 \; \square \; 3 \; \square \; 3\; \square \; 6 = 2

Which of the following series of signs are not\color{#D61F06}{\text{not}} appropriate for the three boxes above?

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