Exams › SSC CGL (Prelims) › General

Select the correct sequence of mathematical signs to replace A and B: $18\ A\ 6\ B\ 3 = 20$

1. ÷, +
2. ×, -
3. -, ×
4. + , ÷

Correct answer: + , ÷

Solution

Using addition first gives $18 + 6 = 24$, and then division by 3 gives $24 \div 3 = 8$, so that does not work. The correct pair is the one that makes the expression equal to 20; among the given options, $18 + 6 \div 3 = 20$ is valid because division is done first: $6 \div 3 = 2$, then $18 + 2 = 20$.

Related SSC CGL (Prelims) General questions

• If ‘+’ means ‘×’, ‘×’ means ‘−’, ‘−’ means ‘÷’, and ‘÷’ means ‘+’, then \(16 + 4 × 18 − 2 ÷ 2 = ?\)
• After interchanging ‘+’ and ‘×’, which equation is true?
• If ‘×’ means ‘−’, ‘−’ means ‘+’, ‘+’ means ‘÷’, and ‘÷’ means ‘×’, which of the following is correct?
• Which two signs should be swapped to make the equation correct? 24 + 8 ÷ 4 − 2 × 3 = 28
• If \(a \% b = a^2 - b^2\) and \(a \% b = 63\), find \(a\) and \(b\).
• How many letters will remain unchanged if the word EDUCATION is arranged in alphabetical order?

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