Who was the first medieval ruler to introduced ministry

Which one of the given mathematical operations will result in 429?

Select the correct combination of mathematical signs to replace the '@' signs and balance the given equation.

22 @ 6 @ 18 @ 17 @ 2

If A $ B means A X B, A € B means A ÷ B, A & B means A + B and A @ B means A - B, then what is the value of '178 & 100 € 25 @ 18 $ 4 & 22'?

After interchanging the given two signs, what will be the value of the given equation? + and ÷

128 - 45 ÷ 72 + 9 X 11

By interchanging the given two numbers (not digits), which of the following equations will be correct?

24 and 15

Which two signs should be interchanged to make the following equation correct?

9 × 10 ÷ 2 – 4 = 51 + 2 

If '$ means +',  '# means –,  '@ means ×' and  '* means ÷', then what is the value of  ' 16 $ 4 @ 5 # 72 * 8 ' ?

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

5 * 14 * 6 * 8 * 9 * 502