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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: ÷, −, ÷, +, =


Team Careers360 13th Jan, 2024
Answer (1)
Team Careers360 23rd Jan, 2024

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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