## Virendra Singh is teaching live on Unacademy Plus

CSIRUGC-NET/]RF DEC-2018 PART A unacademy By- Virendra singh GATE- AIR 6 DBT JRF- AIR 70 CSIR JRF-79 B.Tech- Gold Medalist SOLUTION

1. The diameters of the pinholes of two otherwise identical cameras A and B are 500 m and 200 m, respectively. Then the image in camera A will be 1. sharper than in B 2. darker than in B 3. less sharp and brighter than in B 4. sharper and brighter than in B . Lens diameter= filter size Which sharpen the image . Large diameter- large aperture-an aperture is a hole or an opening through which light travels. So it also brighter than lower diameter

2. The curves of y=2x2 and y=4x intersect each other at 1. only one point, 2. exactly two points. 3. more than two points. 4. no point at all. = 2x 2.0 'S 3 tuuo puinto one

3. What is the value of 12- 22 32-42+ 52-... +172-182 + 19% 2. 12 4. 190 3. 95 2-122 + I g 3. 2. 1-4 C-3 - 23-36 49 64 361

CSIRUGC-NET/]RF DEC-2018 PART A unacademy By- Virendra singh GATE- AIR 6 DBT JRF- AIR 70 CSIR JRF-79 B.Tech- Gold Medalist SOLUTION

At a birthday party, every child gets chocolates, every mother gets 1 chocolate, while no father gets a chocolate. In total 69 personsget 70 chocolates. If the number of children is half of the number of mothers and fathers put together, then , how many fathers are there? 1.22 3. 24 2. 23 4. 69 Cz chilc 4. Lhecalat MoHhex -70-46 24 one chocolat o ach M 69 -23 -24 (22

5. A rectangular photo frame of size 30 cm x 40 cm has a photograph mounted at the centre leaving a 5 cm border all around. The area of the border 1S 600 cm2 3. 400 cm2 2. 350 cm2 4. 700 cm2 scm Rela 30 S- ST

6. A tourist drives 20 km towards east, turns right and drives 6 km, then drives 6 km towards west. He then turns to his left and drives 4 km and finally turns right and drives 14 km. Where is he from his starting point? 1. 6 km towards east 2. 20 km towards west 3. 14 km towards north 4. 10 km towards south danh de L Tobal al

CSIRUGC-NET/]RF DEC-2018 PART A unacademy By- Virendra singh GATE- AIR 6 DBT JRF- AIR 70 CSIR JRF-79 B.Tech- Gold Medalist SOLUTION

7. In an examination 100 questio mark each are given. After the examination, 20 questions are deleted from evaluation, leaving 80 questio with a total of 100 marks. Student A had answered 4 of the deleted questions correctly and got 40 marks, whereas student B had answered 10 of the deleted questions correctly and got 35 marks. In this situation 1. A and B were equally benefitted. 2. A and B lost equally. ns monka que.-1 .lem crb delaked queohim cenc Blost more than A 4. A lost more than B. Sechim 35

8. A circular running track has six lanes each 1 m wide. How far ahead (in metres) should the runner in the outermost lane star from, so as to cover the same distance in one lap as the runner in the innermost lane? 2. 10 4, 36 C/reu Ortum ca)

10. If D ABCBCACAB where A, B and C are decimal digits, then D is divisible by 1. 37 and 29 , /2. 3. 4. 37 but not 29 29 but not 37 neither 29 nor 37 123 23 31266 29

If 'SELDOON, what does 'SPUOS' mean? 15, means 'NOO DLES, th en 1. SALAD 3. RASAM 2. SOUPS 4. ONION

t is free to choose only istry, only Biology or both. If out of ts, Chemistry has been chosen how many 32 students, by 16 and Biology by 25, then Chemistry? 3. 25 have chosen Biology but not 2. 16 4. 7 9 Biolo but noh Chemishu

20. In triangle ABC, AB- 11, BC-61, AC- 60, and O is the mid-point of BC. Then AO is 1.18.5 3. 30.5 2. 24.0 4. 36.0 (Not to scale) A2- 37 537 Rule. (30' S