Q. A duck egg is removed from its mother’s nest and incubated by a barnyard hen. The duckling hatches out in the presence of the barnyard hen and stays in her nest. After a couple of days, the duckling is presented with a choice between its biological mother and the hen that incubated it. The ...

Q. In group living species, the term “dilution effect” refers to A. reduction in aggression among individuals with increasing group size B. reduction in the mobility of individuals with increasing group size C. reduction in the reproductive success of individuals with increasing group ...

Q. During the Pleistocene, which of the following groups experienced the largest mass extinction? A. Large dinosaurs B. Large mammals C. Reptiles D. Trilobites Ans: Large mammals

Q. Which of the following functions describe the graph shown in the below figure? (A) 𝑦 = ||𝑥| + 1| − 2(B) 𝑦 = ||𝑥| − 1| − 1(C) 𝑦 = ||𝑥| + 1| − 1(D) 𝑦 = ||𝑥 − 1| − 1| Ans: y = ||x| − 1| − 1

Q. From the time the front of a train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction as the train. What is the ...

Q. Given that 𝑎 and 𝑏 are integers and 𝑎 + 𝑎2 𝑏3 is odd, which one of the following statements is correct? (A) 𝑎 and 𝑏 are both odd(B) 𝑎 and 𝑏 are both even(C) 𝑎 is even and 𝑏 is odd(D) 𝑎 is odd and 𝑏 is even Ans: a is odd and b is even Sol: Given (a + a2b3) is odd ⇒ a (1 + ab3) is ...

Q. For integers 𝑎, 𝑏 and 𝑐, what would be the minimum and maximum values respectively of 𝑎 + 𝑏 + 𝑐 if log |𝑎| + log |𝑏| + log |𝑐| = 0? (A) -3 and 3(B) -1 and 1(C) -1 and 3(D) 1 and 3 Ans: -3 and 3

Q. A number consists of two digits. The sum of the digits is 9. If 45 is subtracted from the number, its digits are interchanged. What is the number? (A) 63(B) 72(C) 81(D) 90 Ans: 72 Sol: Let the two-digit number is AB The sum of digits = A + B = 9 If 45 is subtracted from the number, ...

Q. A rectangle becomes a square when its length and breadth are reduced by 10 m and 5 m, respectively. During this process, the rectangle loses 650 m2 of area. What is the area of the original rectangle in square meters? (A) 1125(B) 2250(C) 2924(D) 4500 Ans: 2250

Q. Seven machines take 7 minutes to make 7 identical toys. At the same rate, how many minutes would it take for 100 machines to make 100 toys? (A) 1(B) 7(C) 100(D) 700 Ans: 7 Sol: Seven machines take 7 minutes to make 7 identical toys. As all the machines are working parallelly, one ...