Correct Answer - Option 1 : +, ÷, −, =
1. +, ÷, −, =
Given equation: 68 * 138* 23 * 54 * 20
After replacing the * by the symbols in the option, we get:
68 + 138 ÷ 23 - 54 = 20
⇒ 68 + 6 – 54 = 20
⇒ 74 – 54 = 20
⇒ 20 = 20
2. ×, +, −, =
Given equation: 68 * 138* 23 * 54 * 20
After replacing the * by the symbols in the option, we get:
68 × 138 + 23 - 54 = 20
⇒ 9384 + 23 – 54 = 20
⇒ 9407 – 54 = 20
⇒ 9353 ≠ 20
3. =, ×, +, ÷
Given equation: 68 * 138* 23 * 54 * 20
After replacing the * by the symbols in the option, we get:
68 = 138 × 23 + 54 ÷ 20
⇒ 68 = 3174 + 2.7
⇒ 68 ≠ 3176.7
4. ×, +, =, ÷
Given equation: 68 * 138* 23 * 54 * 20
After replacing the * by the symbols in the option, we get:
68 × 138 + 23 = 54 ÷ 20
⇒ 9384 + 23 = 2.7
⇒ 9407 ≠ 2.7
Hence, ‘+, ÷, −, =’ is the correct answer.