Logic

Operator Search

Multiplication and division only - Operator Search

         

What series of signs in the three blanks will make the following equation hold true?

3    4    5    6=10 3 \; \square \; 4 \; \square \; 5 \; \square \; 6 = 10

What series of signs and parentheses on the left side will make the following equality hold true?

120    2    3    4=5 120\; \square \; 2 \; \square \; 3 \; \square \; 4 = 5

8    4    2    18 \; \square \; 4 \; \square \; 2 \; \square \; 1

If we fill in the above blanks using only the operators ×\times and/or ÷\div, is it true that the resultant number is always an integer?

2    2    2    22 \; \square \; 2 \; \square \; 2 \; \square \; 2

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

What series of signs in the three blanks will not \color{#D61F06} { \text{not} } make the following equation true?

7    7    7    7=49 7 \; \square \; 7 \; \square \; 7\; \square \; 7 = 49

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