Which letter-cluster will replace the question mark (?)

Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.

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

24 + 12 ÷ 6 - 8 x 2 = 92

If ' X ' means '+', '+' means ' - ', ' - ' means '÷' and '÷' means ' X ', what will be the value of the following expression?

Which among the given operators should replace the “%” (in the same order) in the given expression below:

7 % 12 % 7 % 38 % 47 % 8

If '&' means '+', '*' means '-', '^' means 'X' and '!' means '÷', then what is the value of the following expression?

15 ^ 4 * 10 & 32 ! 8

Which one of the given mathematical operations will result in 291?

51.884 ×  12.91 ×  16.502 =?

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

- and X

144 + 216 ÷ 8 - 12 X 175 + 34