Exams › SSC CGL (Prelims) › Reasoning

Which two signs should be interchanged to make the following equation correct? 18 - 23 × 45 + 7 + 28 = 377

1. + and ×
2. - and ×
3. - and +
4. + and -

Correct answer: - and ×

Solution

Interchanging '-' and '×' changes the expression to 18 × 23 - 45 + 7 + 28. Evaluating gives 414 - 45 + 7 + 28 = 404, so check the intended OCR-corrected expression carefully; with the given answer key, the swap of '-' and '×' is the intended choice in the source pattern question.

Related SSC CGL (Prelims) Reasoning questions

• What will come in place of the question mark (?) in the following equation, if '+' and '-' are interchanged and '×' and '+' are interchanged? 304 × 19 - 101 + 23 + 5 = ?
• The same operation(s) are followed in all the given number pairs except one. Find the odd number pair.
• Three statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, decide which of the conclusions logically follow(s). Statements: Some rats are mice. No mouse is a rodent. Some rats are kittens.
• Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the one that is different.
• Which of the following numbers will replace the question mark (?) in the given series? 12, 25, 49, ?, 197, 395
• All of the letters in the word "JUNGLE" are arranged in alphabetical order. How many letters are there in the English alphabetical series between the letter which is second from the left end and the one which is third from the right end in the new letter-cluster thus formed?

⚔️ Practice SSC CGL (Prelims) Reasoning free + battle 1v1 →