Question : Directions: Which two signs and numbers need to be interchanged to make the following equation correct? 24 – (9 ÷ 12) + (84 × 4) + 28 = 23
Option 1: 24 and 28, – and ÷
Option 2: 24 and 28, × and ÷
Option 3: 9 and 4, ÷ and ×
Option 4: 12 and 4, ÷ and ×
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Correct Answer: 12 and 4, ÷ and ×
Solution : Given: 24 – (9 ÷ 12) + (84 × 4) + 28 = 23
Interchange the given signs and numbers in the options one by one with the original signs and numbers in the given equation.
Let's check the options – First option: 24 and 28, – and ÷ = 28 ÷ (9 – 12) + (84 × 4) + 24 = 28 ÷ (–3) + (336) + 24 = –9.3 + 336 + 24 = 350.7 ≠ 23 Second option: 24 and 28, × and ÷ = 28 – (9 × 12) + (84 ÷ 4) + 24 = 28 – (108) + (21) + 24 = –35 ≠ 23 Third option: 9 and 4, ÷ and × = 24 – (4 × 12) + (84 ÷ 9) + 28 = 24 – (48) + (9.3) + 28 = 13.3 ≠ 23 Fourth option: 12 and 4, ÷ and × = 24 – (9 × 4) + (84 ÷ 12) + 28 = 24 – (36) + (7) + 28 = 23
So, only the fourth option satisfies the equation. Hence, the fourth option is correct.
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Question : Directions: Which two signs and two numbers should be interchanged in the following equation to make it correct? 264 + 24 × 9 ÷ 60 – 4 = 630
Option 1: 264 and 9; ÷ and −
Option 2: 264 and 9; + and –
Option 3: 4 and 24; ÷ and +
Option 4: 4 and 9; − and ×
Question : Directions: Which two signs and two numbers should be interchanged in the following equation to make it correct? 150 × 15 + 14 – 9 ÷ 2 = 6
Option 1: 9, 2, –, ×
Option 2: 9, 2, ÷, ×
Option 3: 150, 2, ÷, –
Option 4: 15, 9, +, ÷
Question : Directions: Which two signs should be interchanged to make the given equation correct? 912 – 456 × 28 + 390 ÷ 2 = 444
Option 1: ÷ and –
Option 2: ÷ and +
Option 3: – and +
Option 4: + and ×
Question : Directions: Which two signs should be interchanged to make the given equation correct? 3 × 12 – 6 ÷ 2 + 12 = 16
Option 1: ÷ and +
Option 2: × and ÷
Option 3: – and ÷
Option 4: – and +
Question : Directions: Which two signs and two numbers should be interchanged in the following equation to make it correct? 14 × 6 ÷ 12 + 15 – 9 = 203
Option 1: 15 and 6, + and ÷
Option 2: 12 and 15, – and ×
Option 3: 12 and 9, ÷ and –
Option 4: 14 and 6, ÷ and ×
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