Correct Answer: ÷ and +

Solution : Given:
26 ÷ 24 + 6 × 27 – 105 = 29

Replace the given symbols in the options one by one with the original symbols in the given equation.
First options: + and –
26 ÷ 24 – 6 × 27 + 105 = 29
On solving the L.H.S. of the given equation –
= 26 ÷ 24 – 6 × 27 + 105
= 1.08 – 6 × 27 + 105
= 1.08 – 162 + 105
= –55.92 ≠ 29
Second option: ÷ and +
26 + 24 ÷ 6 × 27 – 105 = 29
On solving the L.H.S. of the given equation –
= 26 + 24 ÷ 6 × 27 – 105
= 26 + 4 × 27 – 105
= 26 + 108 – 105
= 29
Third option: + and ×
26 ÷ 24 × 6 + 27 – 105 = 29
On solving the L.H.S. of the given equation –
= 26 ÷ 24 × 6 + 27 – 105
= 1.08 × 6 + 27 – 105
= 6.48 + 27 – 105
= –71.52 ≠ 29
Fourth option: ÷ and –
26 – 24 + 6 × 27 ÷ 105 = 29
On solving the L.H.S. of the given equation –
= 26 – 24 + 6 × 27 ÷ 105
= 26 – 24 + 6 × 0.257
= 26 – 24 + 1.542
= 3.542 ≠ 29

So, the second option satisfies the equation. Hence, the second option is correct.