Sum of the present ages of A, B, C and D is 70 years. After 5 years ratio of their ages is 5:4:4:2. What is C’s present age?

Statements: 

Some designations are descriptions

Some descriptions are securities

No security is a position

Statements : No painting is a pencil.

Some pencils are drawings.

All drawings are sketches.

Statements : All bottles are cans.

                                 All drawers are cans.

Statements:

Some pen is pencil

Only a few pencils is mobile

No mobile is laptop

Conclusions:

Statements:

Only a few subject is colour

Only few colour is game

Only game is mobile

Conclusions:

Statements: All flowers are books.

All books are carpets.

Some carpets are keys.

Some keys are locks.

Statements:

Only a few pen is pencil

No pencil is colour

Only a few colour is mobile

Some mobile is laptop

Statements:

Some number are digit.

Some digit are alphabet.

Only alphabet is vowel.

Some consonant are alphabet.

Statements: All cans are vessels.

Some vessels are jars.

All jars are containers.