The average age of a husband and his wife was 27 years when the child was born, the average age of the husband, the wife and new-born child is 21 years now. The present age of the child is:

If a = 34, b = c = 33, then the value of a³ + b³ + c³ – 3abc is

Comprehension: In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
 Nitrogen is essential to life (1)______ Earth. It is a component of all proteins, and it can be (2)______ in all living systems. Nitrogen compounds are (3)______ in organic materials, foods, fertilisers, explosives and poisons. Nitrogen is crucial to life, (4)______ in excess it can also be (5)______ to the environment.

Select the most appropriate option to fill in blank number 1. 

Rearrange the parts of the sentence in correct order.

P. application, which can also be used to log complaints about

Q. littering or caused by the animals, according to officials

R. registered with the local authority through a mobile phone

S. the residents of Noida can now get their pets like dogs or cats

Select the option that will improve the underlined par t of the given sentence.
 One’s family plays a very major role to continue the trends and age-old traditions.

Select the denotation of the highlighted word.
 The guile of the businessman is well known to his contemporaries.

Select the option that will improve the underlined part of the sentence. In case no improvement is needed, select 'No improvement'.

The teacher advised the children to not went near the lake.

Which of the following statements about the river Brahmaputra is INCORRECT?