Correct Answer - Option 2 : 14 and 21, + and ÷
1) 14 and 21, × and +
Given equation is : 24 ÷ 12 × 21 - 273 + 14 = 179
After interchanging the numbers and signs in L.H.S, we get :
24 ÷ 12 + 14 - 273 × 21
= 2 + 14 - 273 × 21
= 2 + 14 - 5733
= 16 - 5733
= -5717 (False)
2) 14 and 21, + and ÷
Given equation is : 24 ÷ 12 × 21 - 273 + 14 = 179
After interchanging the numbers and signs in L.H.S, we get :
24 + 12 × 14 - 273 ÷ 21
= 24 + 12 × 14 - 13
= 24 + 168 - 13
= 192 - 13
= 179 (True)
3) 21 and 12, + and ÷
Given equation is : 24 ÷ 12 × 21 - 273 + 14 = 179
After interchanging the numbers and signs in L.H.S, we get :
24 + 21 × 12 - 273 ÷ 14
= 24 + 21 × 12 - 19.5
= 24 + 252 - 19.5
= 276 - 19.5
= 256.5 (False)
4) 14 and 24, × and +
Given equation is : 24 ÷ 12 × 21 - 273 + 14 = 179
After interchanging the numbers and signs in L.H.S, we get :
14 ÷ 12 + 21 - 273 × 24
= 1.167 + 21 - 273 × 24
= 1.167 + 21 - 6552
= 22.167 - 6552
= 6529.833 (False)
Hence, "14 and 21, + and ÷" is the correct answer.