Question : Directions: Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation. 121 * 11 * 99 * 11 * 77 * 79
Option 1: ×, −, ÷, +, =
Option 2: ÷, −, ÷, ×, =
Option 3: ÷, −, ×, +, =
Option 4: ÷, −, ÷, +, =
Correct Answer: ÷, −, ÷, +, =
Solution : Given: 121 * 11 * 99 * 11 * 77 * 79
Let's check the given options – First option: ×, −, ÷, +, = ⇒ 121 × 11 − 99 ÷ 11 + 77 = 79 Solving the L.H.S. of the equation – = 1331 − 9 + 77 = 1399 ≠ 79 Second option: ÷, −, ÷, ×, = ⇒ 121 ÷ 11 − 99 ÷ 11 × 77 = 79 Solving the L.H.S. of the equation – = 11 − 9 × 77 = 11 − 693 = –682 ≠ 79 Third option: ÷, −, ×, +, = ⇒ 121 ÷ 11 − 99 × 11 + 77 = 79 Solving the L.H.S. of the equation – = 11 − 1089 + 77 = 1001 ≠ 79 Fourth option: ÷, −, ÷, +, = ⇒ 121 ÷ 11 − 99 ÷ 11 + 77 = 79 Solving the L.H.S. of the equation – = 11 − 9 + 77 = 79
So, only the fourth option satisfies the given equation. Hence, the fourth option is correct.
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