Which two signs should be interchanged to make the below equation mathematically correct?

18 × 6 ÷ 9 + 3 - 25 = 5

This question was previously asked in

DSSSB LDC Official Paper 3 (Held on : 25 Aug 2019 Shift 1)

- ×, ÷
- -, +
- +, ÷
- ×, +

Option 1 : ×, ÷

1. ×, ÷

Given equation: 18 × 6 ÷ 9 + 3 - 25 = 5

After replacing the signs, we get:

**L.H.S = 18 ÷ 6 × 9 + 3 - 25**

**= 3 × 9 + 3 – 25**

**= 27 + 3 – 25**

**= 30 – 25**

**= 5 = R.H.S**

2. -, +

Given equation: 18 × 6 ÷ 9 + 3 - 25 = 5

After replacing the signs, we get:

L.H.S = 18 × 6 ÷ 9 - 3 + 25

= 12 – 3 + 25

= 37 – 3

= 34 ≠ R.H.S

3. +, ÷

Given equation: 18 × 6 ÷ 9 + 3 - 25 = 5

After replacing the signs, we get:

L.H.S = 18 × 6 + 9 ÷ 3 - 25

= 108 + 3 – 25

= 111 – 25

= 86 ≠ R.H.S

4. ×, +

Given equation: 18 × 6 ÷ 9 + 3 - 25 = 5

After replacing the signs, we get:

L.H.S = 18 + 6 ÷ 9 × 3 - 25

= 18 + 2 – 25

= 20 – 25

= -5 ≠ R.H.S

Hence, ‘**×, ÷**’ is the correct answer.

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