Question

What will come in place of the question mark (?) in the following equation, if 't' and '-' are interchanged and 'x' and '' are interchanged? 456 × 4 - 3 ÷ 11 + 70 = ?

• A. 84
• B. 77
• C. 87
• D. 79

Answer 1

Answer:

B. 77

Interchanges given:

• ‘+’ and ‘−’ are interchanged

• ‘×’ and ‘÷’ are interchanged

Original expression

$456 × 4 - 3 ÷ 11 + 70$
After interchanging the operators

• × → ÷

• ÷ → ×

• − → +

• → −

So the new equation becomes:
$456 ÷ 4 + 3 × 11 - 70$

Now solve using BODMAS

• (456 ÷ 4 = 114)

• (3 × 11 = 33)

$114 + 33 - 70 = 77$

Answer: 77