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Which of the following “signs” are placed in place of “symbols” given in the equation to make the equation true?

Select the correct combination of mathematical signs to replace (#) signs and to balance the given equation.

630 # 15 # 14 # 5 # 24 # 121

If 'A' stands for '-', 'B' stands for '×', 'C' stands for '+', and 'D' stands for '÷', then what is the value of the following expression.

If 236 = 33, 487 = 57, 6391 = 57, then 851 = ?

What will be the value of given expression if the numbers ‘55’ and ‘15’ are interchanged?

55 - 40 + 45 ÷ 9 + 15 × 3

(19 % 3) * 11 = 2 and 9 * 3 % 2 = 5. Then, 8 % 4 * 2 = ?

Select the correct combination of mathematical signs that can sequentially replace the $ signs and make the equation correct.