Question : Directions: Which sequence of mathematical symbols can replace * in the given equation?
8 * 5 * 9 * 31
Option 1: –, ×, =
Option 2: –, =, ×
Option 3: =, ×, –
Option 4: ×, –, =
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Correct Answer: ×, –, =
Solution :
Given:
8 * 5 * 9 * 31
Replace * with the mathematical signs and solve the equations one by one using BODMAS.
Let's check the given options –
First option:
–, ×, =
⇒ 8 – 5 × 9 = 31
Solving the L.H.S. of the equation –
= 8 – 45
= –37 ≠ 31
Second option:
–, =, ×
⇒ 8 – 5 = 9 × 31
Solving the L.H.S. of the equation –
= 8 – 5
= 3
Solving the R.H.S. of the equation –
= 9 × 31
= 279 ≠ 3
Third option:
=, ×, –
⇒ 8 = 5 × 9 – 31
Solving the R.H.S. of the equation –
= 45 – 31
= 14 ≠ 8
Fourth option:
×, –, =
⇒ 8 × 5 – 9 = 31
Solving the L.H.S. of the equation –
= 40 – 9
= 31
So, only the fourth option satisfies the given equation. Hence, the fourth option is correct.
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