Verbal Reasoning - Mental Ability Questions

In a certain code language, '-' represents'+', '+' represents 'x', 'x' represents '÷' and '÷'represents '-'. Find out the answer to the following question.

2 - 12 + 10 x 5 ÷ 12 = ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
Millimetre, Micrometre, Nanometre, ?

Select the missing number from the given responses:

Select the missing number from the given options?

Select the odd word/letters/number/number pair from the given alternatives.

The following questions consist of two words that have a certain relationship to each other, followed by four alternatives. Select the best alternative that has same relationship as the original pair of words

Ecstasy : Pleasure

Out of the 100 nature lovers, 20 people wanted to see only bison, 30 wanted to see both bison and tiger, 15 wanted to see only leopard, 25 wanted to see only tiger, 5 wanted to see both bison and leopard and the remaining wanted to see only bear.

How many people wanted to see only one animal?

Consider the given statement/s to be true and decide which of the given conclusions/assumptions can definitely be drawn from the given statement.
Statements:
1. All cycles are ducks.
2. All ducks are swans.
Conclusions:
I. All swans are cycles.
II. Some swans are cycles.