HSSC TGT Science Exam

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?

(1) Kokila is younger than Praveen
(2) Nitin is younger than Praveen
(3) Sudhanshu is older than Nitin
(4) Praveen is not the oldest

Correct Answer: (4) Praveen is not the oldest

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

(1) WORFLW
(2) REWOLF
(3) RELOWF
(4) LOWERF

Correct Answer: (2) REWOLF

33. √324/1.5 = ?/√256

(1) 192
(2) 432
(3) 288
(4) 122

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?

(1) 6 minutes
(2) 8 minutes
(3) 10 minutes utes
(4) 12 min-

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.

(1) 125
(2) 150.25
(3) 50
(4) 56.25

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?

(1) 9 km/hr
(2) 6.75 km/hr
(3) 5.25 km/hr
(4) 7.5 km/hr

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

(1) 12½ seconds
(2) 7½ seconds
(3) 6½ seconds
(4) 3 seconds 3

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?

(1) 53
(2) 39
(3) 44
(d) None of these

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?

(1) 5.05
(2) 6.05
(3) 7.05
(4) 7.55

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

(1) Xanthophyll
(2) Riboflavin
(3) Ribulose
(4) Casein

Correct Answer: (4) Casein

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