Question : Directions: Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
25 * 2 * 220 * 11 * 43
Option 1: +, –, ×, =
Option 2: +, –, ÷, =
Option 3: +, +, ÷, =
Option 4: –, +, ÷, =
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Correct Answer: –, +, ÷, =
Solution :
Given:
25 * 2 * 220 * 11 * 43
Replace * with the mathematical signs and solve the equations one by one.
Let's check the given options –
First option:
+, –, ×, =
⇒ 25 + 2 – 220 × 11 = 43
Solving the L.H.S. of the equation –
= 25 + 2 – 2420
= 27 – 2420
= –2393 ≠ 43
Second option:
+, –, ÷, =
⇒ 25 + 2 – 220 ÷ 11 = 43
Solving the L.H.S. of the equation –
= 25 + 2 – 20
= 27 – 20
= 7 ≠ 43
Third option:
+, +, ÷, =
⇒ 25 + 2 + 220 ÷ 11 = 43
Solving the L.H.S. of the equation –
= 25 + 2 + 20
= 47 ≠ 43
Fourth option:
–, +, ÷, =
⇒ 25 – 2 + 220 ÷ 11 = 43
Solving the L.H.S. of the equation –
= 25 – 2 + 20
= 45 – 2 = 43
So, only the fourth option satisfies the given equation. Hence, the fourth option is correct.
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