Questions

The Infantry Regiment is also known as the Mechanised Infantry Regiment of the Indian Army. Though its aggregate size, it is closer to that or a full mechanised division with 26 mechanised battalions.

Indian Army Corps of Electronics and Mechanical Engineers are an arms and service branch of Indian Army having varied responsibilities of design, development, trial, inspection and refit of weapon systems and equipment. They also provide technical advice to units on systems and recovery operations in peace and war.

Here there are combination of two series.

 1) 9, 18, 36, 72, 144

 2) 8, 6, 4, 2, 0

Therefore, The next number in the given series is 0.

'Are’ needs to be replaced with ‘is’ to make the sentence contextually correct. This is because, ‘in subject verb agreement, we match the subject with the nearest verb or the verb with the nearest or the first subject. But the verb should be matched with the main subject of the sentence’. Here the main subject is ‘Ignorant’ which is singular and so is followed by a singular verb.