Question

By putting suitable signs +, −, ×, ÷, (, ) in between the digits 9 9 9 9, which of the following numbers can be generated this way?

A) -6
B) -5
C) -4
D) 4
E) 5
F) 6
G) 7

Answer 1

To generate the given numbers by putting suitable signs between the digits 9 9 9 9, we need to follow the rules for sign in calculations. The numbers that can be generated using the given digits and signs are: A) -6, B) -5, C) -4, D) 4, E) 5, F) 6.

Step-by-step explanation:

To generate the given numbers by putting suitable signs between the digits 9 9 9 9, we need to follow the rules for sign in calculations. Let's go through the options one by one:

• A) -6: We can get -6 by subtracting 9 from another 9: 9 - 9 = -6.
• B) -5: We can get -5 by subtracting 9 from another 9 and then subtracting 9 from -6: 9 - 9 - 6 = -5.
• C) -4: We can get -4 by subtracting 9 from another 9 and then subtracting 9 from -5: 9 - 9 - 5 = -4.
• D) 4: We can get 4 by adding 9 to another 9 and then subtracting 9 from 5: 9 + 9 - 5 = 4.
• E) 5: We can get 5 by adding 9 to another 9 and then subtracting 9 from 4: 9 + 9 - 4 = 5.
• F) 6: We can get 6 by adding 9 to another 9 and then subtracting 9 from 5: 9 + 9 - 5 = 6.
• G) 7: We cannot generate 7 using the given digits and signs.

Therefore, the numbers that can be generated using the given digits and signs are: A) -6, B) -5, C) -4, D) 4, E) 5, F) 6. The answer is A, B, C, D, E, F.