PGT Computer Science (Level-3), (HTET Exam 2020)

Total Questions: 150

71. If Shyam writes down all the integers from 1 to 100, then how many times does he write 3 ?

Correct Answer: C. 20
Solution:

Clearly, from 1 to 100, there are ten numbers with 3
as the unit's digit:
3, 13, 23, 33, 43, 53, 63, 73, 83, 93
and ten numbers with 3 as the ten's digit:
30, 31, 32, 33, 34, 35, 36, 37, 38, 39.
So, required number = 10 + 10 = 20.

72. A is elder to B while C and D are elder to E. E lies between A and C and Cis elder to B. then which of the following statements is necessarily true?

Correct Answer: D. E is elder to В.
Solution:

73. Among M, T, R, K and D, each having a different height, M is shorter only from T and D is taller only from K. Who will be the third tallest person among them?

Correct Answer: D. R
Solution:

Given, M is shorter only from T i.e., T > M
and D is taller only from K i.e., D > K
Hence, T>M > R > D> K
Hence, R be the third tallest person among them.

74. Solve the equations :

Correct Answer: A. 2¹¹⁄₁₂
Solution:

75. After 5 years, father's age will be three times of his son's age. 5 years ago, father's age was 7 times of his son's age. The present age of the father is:

Correct Answer: A. 40 years
Solution:

76. A man is performing yoga with his head down and legs up. His face is towards the West. In which direction will his left hand be?

Correct Answer: A. North
Solution:

77. Two taps A and B would fill a tank completely in 30 and 36 minutes respectively. Both taps being opened, find when the tap A must be turned off so that the tank must be just filled in 18 minutes?

Correct Answer: A. After 15 minutes
Solution:

78. In how many years will a sum of ₹ 800 become ₹ 926.10 at 10% per annum interest compound half yearly?

Correct Answer: B. 1½ years
Solution:

79. The least square number, which is divisible by 8, 15 and 24 is equal to:

Correct Answer: C. 3600
Solution:

80. If the selling price of 6 pens is equal to the cost price of 8 pens, then profit/loss in percentage is:

Correct Answer: D. 33⅓ % profit
Solution: