If "÷" denotes "multiplied by", "+" denotes "subtracted from", "–" denotes "added to" and "x" denotes "divided by", then which of the following equation is true?

In a certain code language, "PEN-TAN" is written as "0". How is "DEN-COB" written in that code language?

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Superconductors

Karan remembers that his sister's birthday is not after 18th August. Karan's mother remembers that Karan's sister birthday is before 20th August but after 17th August. On which date of August is Karan's sister birthday?

Karan remembers that his sister's birthday is not after 18th August. Karan's mother remembers that Karan's sister birthday is before 20th August but after 17th August. On which date of August is Karan's sister birthday?

The ratio of present ages of Anil and Aakash is 4 : 5. Three years later their ages will be in ratio 7 : 8. What is the present age (in years) of Anil?

In the following question, select the missing number from the given series.
3, 4, 5, 4, 9, 10, 6, 16, 15, 9, 25, 20, 13, 36, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
KV, LU, MT, ?