If M means ÷, R means +, T means - and K means ×, then

20 R 16 K 5 M 10 T 8 = ?

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

(6 - 5 ÷ 40) + 35 × 2

If ‘+’ means ‘÷’, ‘−’ means ‘+’, ‘÷’ means ‘×’, and ‘×’ means ‘−’, then what will be the value of the following expression?

30 × 6 – 5 ÷ 4 + 2

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

4 + 2 ÷ 7 + 8 × 9 = 25

Three statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

Some teachers are scientists.

All scientists are doctors.

All doctors are engineers.

Conclusions:

I. Some doctors are teachers.

II. Some engineers are teachers.

III. Some doctors are scientists.

Three statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:

Some colours are rainbows.

Some paints are rainbows.

All rainbows are drawings.

Conclusions:

I. Some drawings are colours.

II. All paints are drawings.

III. Some drawings are rainbows.

In the following figure, rectangle represents Doctors, circle represents Nurses, triangle represents Surgeon and square represents Patients. Which set of letters represents Nurses who are either Surgeons or Patients?

In the given figure, if the triangle represents graduates, rectangle represents doctors and circle represents women, then what is the number of those women who are graduates but NOT doctors?

How many students are both writers and teachers?

In the question below are given statement followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

A # B → All A is B

A @ B → Some A is B

A © B → No A is B

A $ B → Some A is not B

Statement: J @ H © S # T

Conclusion:

I. J @ S

II. T @ S