NATIONAL LEVEL SCIENCE TALENT SEARCH EXAMINATION

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UNIFIED COUNCIL An ISO 900: 008 Certified Organisation NATIONAL LEVEL SCIENCE TALENT SEARCH EXAMINATION Mathematics. (D) Numbers on a telephone keypad are,,,, 5, 6,, 8, 9, 0.

1 UNIFIED COUNCIL An ISO 900: 008 Certified Organisation NATIONAL LEVEL SCIENCE TALENT SEARCH EXAMINATION Mathematics. (D) Numbers on a telephone keypad are,,,, 5, 6,, 8, 9, 0. We, know that, any number multiplied by 0 is 0 itself. Product of all the numbers on a telephone keypad = = 0. (C) We have, Option (A), 80 paise =.80 [ = 00 paise] Option (B), =.85 Option (C), 5 5 paise =.5 Option (D), Twenty 0 paise coins = So, option (C) has least value.. (A) 5 + = 9 X X V + X I V = X X X I X symbols are needed.. (A) Consider the following examples. (a) = 0 (b) = 0 (c) 99 9 = 0 5. (C) (9 8) + ( 6) + (5 ) + ( ) = = 6. (D) min 0 sec = (60 + 0) sec = 80 sec Fraction = 5 = Paper Code: UN Solutions for Class :. (D) Radius = Diameter r = d 8. (B) A Diameter is doubled D = d Radius (R) = Diameter = d =d = r Radius is doubled. C B D The line segments formed are AB, BD, CD, AC, AD and CB, which are 6 in number. 9. (D) Missing fraction = 6 = = 0. (D) Every number is a factor and multiple of itself. (A) Largest number formed by using the digits 5,,, 6, 0 = 650 To make the largest number from the given digits, greatest digit will be put at the highest place and so on. Smallest 5-digit number formed by using the digits 5,,, 6, 0 = 056 To make the smallest number from the given digits, smallest digit will be put at the highest place and so on. Required difference = = 96

2 . (C) Area of A = square units Area of B = 8 square units Area of C = square units Area of D = 5 square units. (B) C X = 00 0 = 90 = XC is correct. XI IX = (0 + ) (0 ) = 9 = XX is wrong. DC C = = 500 = D is correct. LXI LIX = ( ) [50 + (0 )] = 6 59 = = II is correct.. (B) The pages which contain the digit 0 are 0, 0, 0, 0, 50, 60, 0, 80, 90, 00, 0, 0, 0, 0, 05, 06, 0, 08, 09, 0, 0, 0, 0, 50, 60. So, there are 5 pages which contain the digit 0 in a book of 60 pages. 5. (D) In option (A), one-quarter = shaded. In option (B) / 8 = part is part is shaded. In option (C), / 8 = part is shaded. In option (D), = part is shaded. 6. (C) Since, in border X, 6 small rope piece of cm needed to make the border. In same way, 0 small rope piece of cm needed to make the border. Hence, length of the border Y = 0 cm = 0 cm. (C) Total number of glasses = 5 = 0 8. (B) The first three common multiples of and 9 are 9, 8 and. Their product is 9 8 = The difference in the place values of in is 000 = (A) 0. (D) : 00 noon is : 00 p.m. not : 00 am. (C) Among the given options, only 56 when rounded off to nearest 00 gives 500, since 6 > 50 So, actual population of Bolivia is 56.. (C) The smallest number which is a common multiple of 6 and 8 9 is. Required result = 5+ = 5 + = 59. (B) Time in India - :5 pm Time difference = 5 hours Time in USA = Time in India + Time difference = : 5 pm + 5 hours = : 5 pm + hours + hours = : 5 am + hours = : 5 am. (D) TTh Th H 0 T 0 0 O 0 A five digit number begins with ten thousand. 5. (D) Kg g kg g Quantity of ghee left in the can is kg 00 g. 6. (D) There are 5 weeks in a year. (A) = (C) Total number of legs = = = (B) Figure (A) has faces Figure (B) has 6 faces Figure (C) has face Figure (D) has faces Only figure (B) consists of exactly 6 faces 0. (C) The given rectangle is The area of the rectangle = square cm. Therefore, the answer is square cm.

3 . (B) = = 8. (B) The required number = = 8. (D) Of the given options 56 is the required smallest 6-digit number.. (C) Length of bridge = 600 m Length of truck = 5 m Gap between trucks = m Total length required by truck = Length of a truck + Gap between trucks = 5m + m = 6m So, number of trucks that can stand on the bridge = 600 m 6 m = 00 trucks 5. (C) Birthday of Amar = th June Day on 8th March, 05 = Monday Number of days from 8th March to th June [ ] = 6 days So, 6 = = Monday day Day on Amar s birthday = Sunday 6. (C) Of the given option (C), can be tesellated. 8. (C) Volume of lemonade = 00 m l Volume of lemodade Moina drank = of 00 m l = 00 m l Volume of lemonade left = Total volume Volume drank = 00 m l 00 m l = 00 m l 9. (B) Number of beads with Preeti = 5 Number of beads with Rani = = 69 Number of beads with Kamala = = 5 Total number of beads = = 0 0. (C) Weight of Arun = kg Weight of Tarun = kg + 5 kg = kg Weight of Varun = kg + kg = kg Weight of Karan = kg 8 kg = 6 kg The heaviest is Varun. Therefore, the answer is option (C) Varun.. (A) 0 days after rd November falls on rd December.. (B) Perimeter of the given figure = (C) Area of figure P = sq. units = 6 sq. units = 56 cm. Area of figure Q = 6 full squares. (C) 0 0 = 00 = 6 sq. units Required number = = 00. Area of figure R = 5 full squares = 5 sq.. (C) All the multiples of 6 can be evenly units divided by. Area of figure S = 6 full squares = 6 sq. units 5. (D),,, =,,, From this, clearly, figure R has a different Hence, the produce has digits. area than the others.

4 General Science 6. (C) During the process of photosynthesis, CO is taken in and oxygen is given out by green leaves of plants.. (A) Amphibians and reptiles are egg laying animals. 8. (C) Teeth numbered and are incisors. 9. (D) In the given box P-seed, Q-fruit, R-root, S-stem. Ginger is a modified stem that stores extra food. S includes modified stems. 50. (C) Grasshopper sits mostly on green plants. Hence, green colour is suitable to hide from its enemies in a forest. 5. (C) Kidneys filter out the waste materials from the blood. 5. (B) Fish is an aquatic animal that lives only in water. 5. (C) Heterotrophs are the living things that depend on plants directly or indirectly for their food. In the given table Q-herbivores, R - carnivores and S-omnivores. 5. (B) Roots absorb water from the soil. 55. (B) In the given figure, the plant is responding to sunlight 56. (C) Intermolecular space changes between the molecules when a substance it cooled. 5. (C) The dark-coloured spots form on the moist bread are spore cases. Spores which reproduce the mould are contained in the cases. 58. (A) The given figure shows interdependence between plants and animals. P represents carbon dioxide. Carbon dioxide released by humans and animals is used by green plants for carrying out photosynthesis. 59. (D) Moon is a natural satellite of the earth. 60. (B) A solid like ice on melting changes to the liquid state. 6. (B) Roots absorb water from soil. The stem conducts water to all parts of the plants and leaves through vessels. This water is used by the leaves to synthesis food during photosynthesis. 6. (C) The boiling of milk kills germs. 6. (C) During photosynthesis light energy is converted into chemical energy. 6. (C) The given classification is based on the food they eat. 65. (A) In solid substances like ice the force between the molecules is the highest. 66. (C) Hair in our nostrils keep away or stop the dust entering into our respiratory system. 6. (D) Sugar cube dissolved in hot water. 68. (B) The word planet means wanderer. 69. (C) In the given figure, teeth labelled R represent premolars. Premolars help in cracking and breaking hard foods. 0. (C) In the given solar system R represents the planet Jupiter.. (C) In a cell, chemical energy is stored.. (D) The swollen leaf base or petiole of Eichhornia is thick and glossy and it help to rise above the surface of water.. (C) The correct path of the food inside our body is Mouth stomach intestine blood.. (C) Exchange of gases takes place in a leaf. 5. (B) Peas are rich in proteins. 6. (A) Claypot is made from clay which is a nonliving material. Pepper, paper and cane chair are obtained from living objects, i.e., plants.. (D) It is easy to shift cloth tents from one place to another to conduct circuses at various places. 8. (C) Some animals like zebras, tigers and leopards have stripes or spots on their body which help them merge or mix with their surroundings. 9. (D) The animals in the group S are omnivores. As rat is an omnivore, it should be placed in group S. 80. (B) Tadpole is the larval stage of frog. It resembles a fish. It undergoes metamorphosis and develops into an adult frog. 8. (A) Tall and straight trees with needle like leaves without flowers are usually found in hilly areas.

5 8. (C) The given properties belong to a solid object, the pebble. 8. (C) The water droplets found in the plastic bag are formed due to the transpiration of leaves. 8. (B) X is stomach and Y is small intestine. 85. (A) Part labelled as P on the tongue has a sensation of bitter taste. 86. (A) Mangroves grow in marshy areas. Coconut in coastal areas, cactus in desert areas and mango in temperature regions or hot and damp places. 8. (C) Cockroach shows three stages of life cycle. Adult female cockroach lays eggs. The eggs hatch into nymph and develop into adults. 88. (C) Oxygen is necessary for survival of living organisms. It combines with food and gives us energy. 89. (B) Rabbit is a primary consumer or herbivore. 90. (C) Duckweed is a floating aquatic plant that do not need soil to grow. 9. (A) 9. (C) 9. (B) 9. (C) 95. (C) 96. (D) 9. (B) 98. (A) 99. (D) 00. (A) 5

Academic Year Second Term. Science Revision sheets

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