Correct Answer: ÷, ×, +, =

Solution : Given:
20 _ 4 _ 6 _ 5 _ 35

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: ÷, ×, –, =
20 ÷ 4 × 6 – 5 = 35
On solving the L.H.S. of the given equation –
= 5 × 6 – 5
= 30 – 5
= 25 ≠ 35
Second option: ×, ÷, +, =
20 × 4 ÷ 6 + 5 = 35
On solving the L.H.S. of the given equation –
= 20 × 0.67 + 5
= 13.4 + 5
= 18.4 ≠ 35
Third option: ÷, ×, +, =
20 ÷ 4 × 6 + 5 = 35
On solving the L.H.S. of the given equation –
= 5 × 6 + 5
= 30 + 5
= 35
Fourth option: +, ×, ÷, =
20 + 4 × 6 ÷ 5 = 35
On solving the L.H.S. of the given equation –
= 20 + 4 × 1.2
= 20 + 4.8
= 24.8 ≠ 35

So, the third option satisfies the given equation. Hence, the third option is correct.