HSSC TGT Science Exam

Total Questions: 80

31. Sudhanshu is as much older than Kokila as he is younger than Praveen. Nitin is as old as Kokila. Which of the following statements is wrong?

Correct Answer: (4) Praveen is not the oldest

32. LICNEP is related to PENCIL in the same way FLOWER will be related to:

Correct Answer: (2) REWOLF

33. √324/1.5 = ?/√256

Correct Answer: (1) 192
Solution:√324/1.5 = ?/√256 = 18/1.5 =x/16

x = 16 *2 = 192

34. The pipes X and Y can fill a cistern in 24 min. & 32 min. respectively. If both the pipes are opened together then af- ter how much time X should be closed so that the tank is full in 18 minutes?

Correct Answer: (2) 8 minutes
Solution:X takes = 24 mins

y takes = 32 mins

Working together for 8 mins. 32 + 24 = 56lit After closing y, x feels = 4 x 10 = 40 unit 8 + 10 = 18m total tank full . Hence it is required to open y pipe for 8 minutes

35. If the side of square is in- creased by 25%, then how much percent does its area in- crease.

Correct Answer: (4) 56.25
Solution:Area of square = side2

x*x = x^2

4*4 = 16

5*5 = 25

25-16 = 9

9/16*100 = 56.25

36. If a Man's speed with the cur- rent is 12 km/hr & the speed of current is 1.5 km/hr. Then what will be the speed of the man against the current?

Correct Answer: (1) 9 km/hr
Solution:According to the question current (w) and speed of boat (y)

= 12km / h * r

Speed of current ( omega)= 1.5km / hr

.:. Speed of boat (y) = 12 - 1.5 = 10.5 km/hr

.:. Against the current men speed

= y - w = 10.5 - 1.5 = 9km / h * r

37. A train takes 5 seconds to pass an electric pole. If the length of the train is 120 meters, the time taken by it to cross a

Correct Answer: (1) 12½ seconds
Solution:Length of train = 120 min. Time taken = 5 sec. Speed of train= 24 mins/sec. Total distance (length of train + platform) =120+ underline 180 = 300 Time taken = 300/24 =12.5 sec

38. Which is the smallest number that should be subtracted from 1936 so that when divid- ed by 9. 10. 15 it will leave the same remainder 5?

Correct Answer: (d) None of these
Solution:LCM of 9, 10, 1590

.:. 46-5 41

.:. 41 to be subtracted

39. Average weight of 50 balls is 5 gm. If the weight of a bag is also included in the average weight increased by 0.05 gm what is the weight of the bag?

Correct Answer: (4) 7.55
Solution:Average weight of 50 balls = 5 gram ... Total weight adding bag = 51 * 0.05 = 2.55 Weight of bag = 5 + 2.55 = 7.55

40. 40. The colour of cow milk is slightly yellow due to the pres- ence of which of the following

Correct Answer: (4) Casein
Solution:The colour of cow milk is slightly yellow due to the pres- ence of Carotene (Casein).