Kerala PSC Maths Questions and Answers Part 1

1. If 1400 x = 1050, then what is the value of x?

A) 1

B) 4/3

C) 4/7

D) 3/4

Answer: D

x= 1050 / 1400 = 3/4

2. If 15 men can complete a work in 12 days, then how many men are required to complete the work in 60 days?

A) 4

B) 3

C) 6

D) 9

Answer: B

M1 × D1 = M2 × D2

15 × 12 = M2 × 60

i.e., 15× 12 ⁄ 60 = 3

3. A person travels for 15 hours, the first half at 21 Km/ hr and the other half at 24 Km/hr. Find the distance travelled.

A) 336 Km

B) 346 Km

C) 224 Km

D) 285 Km

Answer: A

Average speed= 2XY / X + Y

Avg. Speed = 2 × 21 × 24 / 21 + 24 = 1008/ 45 = 22.4

Time: 15hrs

Distance = Speed × Time= 22.4 × 15 = 336 Km

4. The distance covered by a man walking for 20 minutes at a speed of 6 km/hr is

A) 1.8 km

B) 3 Km

C) 2 Km

D) 1.5 Km

Answer: C

Distance = Speed × Time

Time = 20 minutes i.e. 20/60 hours

Therefore, D= 6 × 20/60 = 2

5. √162 / ? =? / √18

A) 62

B) 32

C) 45

D) 54

Answer: D

?² = √ 81 × 2 × √ 9 × 2

9 × 3 × 2 = 54

6. 28, 36, 22, 16, 48, 18, 23. Find the median of these numbers?

A) 28

B) 22

C) 23

D) 36

Answer: C

Write the given series in ascending order- 16, 18, 22, 23, 28, 36, 48. The middle number is 23.

7. If DELHI is coded as CDKHG, then what is the code of KOCHI?

A) LMDGJ

B) MQEJL

C) JNBGH

D) IMBGH

Answer: C

8. A person crosses 800m long street in 6 minutes. What is the approximate speed in kilometer per hour?

A) 8 Km/ hr

B) 6 Km/ hr

C) 10 Km/ hr

D) 9 Km/ hr

Answer: A

Distance = 800m = 800 /1000

Time = 6 minutes = 6/ 60 hr

Speed = Distance / Time= 800 / 1000 × 6 / 60 = 8 Km / hr