Answer: D) 51 Explanation: Unit digit of this expression is always 1 as the base ends with 1.  For the tenth place digit we need to multiply the digit in the tenth place of the base and unit digit of the power and take its unit digit. i.e, tenth place digit in 2151 is 5 and tenth place digit in power 415 is 1 And the units digit in the product of 5 x 1 = 5   Therefore, last two digits of 2151415 is 51.

undefined

Answer: C) 35 days Explanation: Distance d = 1200kmlet S be the speed he walks 15 hours a day(i.e 24 - 9)so totally he walks for 70 x 15 = 1050hrs. S = 1200/1050 => 120/105 = 24/21 => 8/7kmph given 1 1/2 of previous speedso 3/2 * 8/7= 24/14 = 12/7 New speed = 12/7kmph Now he rests 10 hrs a day that means he walks 14 hrs a day. time = 840 x 7 /12 => 490 hrs=> 490/14 = 35 days So he will take 35 days to cover 840 km.

A. National census does not identify ethnic groups within India.

B. Here are examples of some specific groups identified by the national census.

1. Tribal Groups: Santhal, Gond, Adivasi, Bodo, Meena, Kushwaha

2. Religious Groups: Hindu, Muslim, Christian, Sikh, Buddhist, Jain, Parsi

3. Linguistic Groups: Hindi, Bengali, Marathi, Tamil, Telugu, Urdu, Gujarati, Kannada, Punjabi, Assamese