Coding and Decoding Questions

If 18$2 = 10, 8$4 = 6 and 12$18 = 15, then find the value of 7$9 = ?

In a certain code, TRIPPLE is written as SQHOOKD. How is EXOTIC coded in that code?

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

18 + 26 - 25 x 10 ÷ 5 = 42

If "A" denotes "addition", "B" denotes "divided by", "C" denotes "multiplication" and "D" denotes "subtraction", then

96 B 12 C 4 A 8 D 32 = ?

Which one of the following interchanges in signs and numbers would make the given equation correct?

3 + 5 - 2 = 4

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

13 - 14 ÷ 30 x 7 + 15 = 13

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

14 + 18 x 40 - 10 ÷ 20 = 66

Which of the following interchange of signs would make the equation correct?

5 + 3 x 8 ­ 12 ÷ 4 = 3