Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
50 * 2 * 3 * 30 * 10 * 40 * 20
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ×, =, ×, ×, −, ×
Given equation is: 50 * 2 * 3 * 30 * 10 * 40 * 20
Checking all the options one by one and applying all the signs to the equation:
1. =, ×, ×, +, –, ÷
50 = 2 × 3 × 30 + 10 – 40 ÷ 20
⇒ 50 = 180 + 10 – 2
⇒ 50 = 180 + 8
⇒ 50 = 188
50 is not equal to 188.
2. –, ÷, ×, ×, =, ×
50 – 2 ÷ 3 × 30 × 10 = 40 × 20
⇒ 50 – 20 × 10 = 800
⇒ 50 – 200 = 800
⇒ -150 = 800
-150 is not equal to 800.
3. =, ×, +, ×, –, ÷
50 = 2 × 3 + 30 × 10 – 40 ÷ 20
⇒ 50 = 6 + 300 – 2
⇒ 50 = 306 – 2
⇒ 50 = 304
50 is not equal to 304.
4. ×, =, ×, ×, −, ×
50 × 2 = 3 × 30 × 10 – 40 × 20
⇒ 100 = 900 – 40 × 20
⇒ 100 = 900 – 40 × 20
⇒ 100 = 100
100 is equal to 100.
Hence, option 4 is the correct option.