1621: What number comes next?
4, 196, 16, 144, 36, 100, 64,...
(a) 36
(b) 100
(c) 80
(d) 64
1622: The ideal climatic conditions for the cultivation of rice are
(a) rainfall above 100 cm, temperature above 25°C
(b) cool and moist climate for the entire crop period
(c) rainfall below 100 cm, temperature below 25°C
(d) warm and dry climate during the entire crop period
1623: Salinization occurs when the irrigation water accumulated in the soil evapo- rates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
(a) It greatly increases the crop production.
(b) It makes some soils impermeable.
(c) It raises the water table.
(d) It fills the air spaces in the soil with water.
1624: What was the immediate reason for Ahmad Shah Abdali to invade India and fight the Third Battle of Panipat ?
(a) He wanted to avenge the expulsion by Marathas of his viceroy Timur Shah from Lahore
(b) The frustrated governor of Jullundhar Adina Beg Khan invited him to invade Punjab
(c) He wanted to punish Mughal administration for non-payment of the revenues of the Chahar Mahal (Gujarat, Aurangabad, Sialkot and Pasrur)
(d) He wanted to annes all the fertile plains of Punjab up to the borders of Delhi to his kingdom
1625: While adding the first few continuous natural numbers, a candidate missed one of the numbers and wrote the answer as 177. What was the number missed?
(A) 13
(B) 14
(C) 12
(D) 11