Mathematical operations
Top questions
See all →- If ‘+’ means ‘−’, ‘−’ means ‘×’, ‘×’ means ‘÷’ and ‘÷’ means ‘+’, find the value of ? in:40 × 8 ÷ ? − 3 + 10 = 16 Answer: C. 7 Answer: (C) 7 After replacing the signs: 40 ÷ 8 + ? × 3 - 10 = 16 . 5 + 3 × ? − 10 = 16 → 3 × ? = 21 → ? = 7. 1
- Which two signs should be interchanged to make the following equation correct?16 + 5 − 2 ÷ 48 × 6 + 10 = 15 Answer: C. ÷ and × Answer: (C) ÷ and × Interchanging ÷ and × gives 16 + 5 - 2 × 48 ÷ 6 + 10 = 15 . By BODMAS the left side is 15, which equa... 1
- Select the correct combination of mathematical signs to replace the * signs (in order, from left to right) and balance the equation.48 * 6 * 4 * 15 * 3 * 11 = 26 Answer: D. ÷, ×, +, ÷, − Answer: (D) ÷, ×, +, ÷, − Put the signs ÷, ×, +, ÷, − in order: 48 ÷ 6 × 4 + 15 ÷ 3 - 11 . By BODMAS this equals 26... 1
- If the signs ‘+’ and ‘×’ are interchanged and the numbers 3 and 6 are interchanged, what will be the value of the following?6 + 9 × 3 − 12 ÷ 4 Answer: A. 30 Answer: (A) 30 Interchange the signs: 6 × 9 + 3 - 12 ÷ 4 . Interchange 3 and 6: 3 × 9 + 6 - 12 ÷ 4 . BODMAS: 27 + 6 − 3 = 30. 1
- If 5 $ 3 = 815, 7 $ 2 = 914 and 6 $ 4 = 1024, then what is the value of 8 $ 6? Answer: B. 1448 Answer: (B) 1448 5 $ 3: 5 + 3 = 8 and 5 × 3 = 15, written side by side: 815. Check 7 $ 2: 9 and 14 → 914; 6 $ 4: 10 and 24 →... 1
- If L stands for ‘÷’, M for ‘×’, P for ‘+’ and Q for ‘−’, which of the following equations is correct? Answer: B. 8 P 6 M 2 Q 4 L 2 = 18 Answer: (B) 8 P 6 M 2 Q 4 L 2 = 18 Replace the letters and evaluate each option by BODMAS. 8 + 6 × 2 - 4 ÷... 1