Question
In an imaginary mathematical system, symbol '–' stands
for addition, symbol '+' stands for division, symbol '×' stands for subtraction, and symbol '÷' stands for multiplication. All other rules of mathematics are the same as in the existing system. What is the value of the following expression? 240 × 72 + 8 ÷ 24 – 6Solution
Decoding the information, Given: 240 × 72 + 8 ÷ 24 – 6 After replacing the signs from left to right and using the BODMAS rule, = 240 - 216 + 6 = 246 - 216 = 30 Hence, “30” is the correct answer.
Find the missing number in the given number series.
58, 86, 142, ?, 478, 926
7, 6, 10, 27, 104, ?
Find the missing number (?) in the given number series.
2, 6, 18, 54, ?, 486
A series given below follows a certain pattern,
1800, 469, (?), 855, 980, 953
If (?) = B – 2, then find the nearest cube root of B.
142, 148, 160, 178, ?, 232
15.975 ×27.825 + (76.01)² + 12.98×18.426 = ?+ (79.09)²
43, 56, 82, ?, 173, 238
4, 9, 24, 69, ?, 609
2, 2, 6, 30, ?, 1890
Find the missing number in the given number series.
3, 7, 18, 38, 69, ?