14 ? 2 ? 7 ? 3 ? 9 = 10
Either insert +, -, x or /
To solve this sequence and make it equal to 10, we need to determine the operations between the numbers. Let's go step by step:
14 ? 2 ? 7 ? 3 ? 9 = 10
To find the correct operation between the first two numbers (14 and 2), we can try each operation and see which one results in 10:
14 + 2 = 16 (not 10)
14 - 2 = 12 (not 10)
14 x 2 = 28 (not 10)
14 / 2 = 7 (not 10)
Since none of the operations between 14 and 2 result in 10, let's move on to the next pair.
14 ? 2 ? 7 ? 3 ? 9 = 10
For the next pair of numbers (2 and 7), we'll do the same process:
2 + 7 = 9 (not 10)
2 - 7 = -5 (not 10)
2 x 7 = 14 (not 10)
2 / 7 ≈ 0.2857 (not 10)
Again, none of the operations between 2 and 7 give us a result of 10. Let's continue.
14 ? 2 ? 7 ? 3 ? 9 = 10
For the third pair (7 and 3), we'll follow the same steps:
7 + 3 = 10 (equals 10!)
7 - 3 = 4 (not 10)
7 x 3 = 21 (not 10)
7 / 3 ≈ 2.3333 (not 10)
Success! Adding the pair 7 and 3 together results in 10. Therefore, we can fill in the equation as follows:
14 ? 2 + 7 ? 3 ? 9 = 10
Now, let's look at the last pair.
14 ? 2 + 7 ? 3 ? 9 = 10
For the numbers 3 and 9, we'll follow the same process once again:
3 + 9 = 12 (not 10)
3 - 9 = -6 (not 10)
3 x 9 = 27 (not 10)
3 / 9 ≈ 0.3333 (not 10)
None of the operations between 3 and 9 give us a result of 10. Therefore, the correct equation is:
14 ? 2 + 7 - 3 ? 9 = 10
Based on our calculations, we found that the correct operations to fill in the blanks are addition "+" between 2 and 7, and subtraction "-" between 7 and 3.