Question

Select the correct combination of mathematical signs to replace '*' signs and to balance the given equation:

9 * 7 * 2 * 3 * 10

1. × ÷ + =
2. - + × =
3. + - × =
4. × + = -

Answer 1

Correct Answer - Option 3 : + - × =

1) × ÷ + =

Given expression: 9 * 7 * 2 * 3 * 10

After replacing the ‘*’ by the given symbols, we get:

9 × 7 ÷ 2 + 3 = 10

⇒ 9 × 3.5 + 3 = 10

⇒ 31.5 + 3 = 10

⇒ 34.5 ≠ 10

2) - + × =

Given expression: 9 * 7 * 2 * 3 * 10

After replacing the ‘*’ by the given symbols, we get:

9 - 7 + 2 × 3 = 10

⇒ 9 – 7 + 6 = 10

⇒ 15 – 7 = 10

⇒ 8 ≠ 10

3) + - × =

Given expression: 9 * 7 * 2 * 3 * 10

After replacing the ‘*’ by the given symbols, we get:

9 + 7 - 2 × 3 = 10

⇒ 16 – 6 = 10

⇒ 10 = 10

4) × + = -

Given expression: 9 * 7 * 2 * 3 * 10

After replacing the ‘*’ by the given symbols, we get:

9 × 7 + 2 = 3 – 10

⇒ 63 + 2 = -7

⇒ 65 ≠ -7

Hence, ‘+ - × =’ is the correct answer.