Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the equation.
25 * 7 * 40 * 20 * 4 * 210
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ×, +, −, ÷, =.
Given equation: 25 * 7 * 40 * 20 * 4 * 210
Let us check all the options:
Option 1: +, −, =, ÷, ×
The expression becomes:
= 25 + 7 - 40 = 20 ÷ 4 × 210
= -8 is not equal to 1050.
Option 2: ×, −, +, ÷, =
The expression becomes:
= 25 × 7 - 40 + 20 ÷ 4 = 210
= 140 is not equal to 210.
Option 3: −, +, =, ÷, ×
The expression becomes:
= 25 - 7 + 40 = 20 ÷ 4 × 210
= 58 is not equal to 1050.
Option 4: ×, +, −, ÷, =
The expression becomes:
= 25 × 7 + 40 - 20 ÷ 4 = 210
= 210 is equal to 210.
Hence, option 4 is the correct answer.