Competitive Exams : Quantitative Aptitude - HCF/LCM (Set 4) | Concept of Maths

Question 1

If they start running simultaneously in the same direction, after how much time will they all meet at the starting point again?

Accepted Answer

A) 210 seconds

Answer

B) 180 seconds

Answer

C) 240 seconds

Answer

D) 150 seconds

Question 2

If they all flash together at exactly 9:00 AM, how many times will they flash together between 9:00 AM and 11:00 AM (inclusive of both)?

Accepted Answer

B) 81 times

Answer

A) 80 times

Answer

C) 40 times

Answer

D) 41 times

Question 3

If each tile costs $15, what is the total cost of paving the floor?

Accepted Answer

A) $6,750

Answer

B) $6,000

Answer

C) $7,200

Answer

D) $5,850

Question 4

If they trigger simultaneously at the start, in how many minutes will they ring together again?

Accepted Answer

A) 8.4 minutes

Answer

B) 7.2 minutes

Answer

C) 9.6 minutes

Answer

D) 10.2 minutes

Question 5

What is the value of this greatest four-digit number?

Accepted Answer

A) 9831

Answer

B) 9828

Answer

C) 9579

Answer

D) 9999

Question 6

What is the value of the least positive integer that satisfies this condition?

Accepted Answer

A) 1394

Answer

B) 1400

Answer

C) 1406

Answer

D) 1388

Question 7

What is the sum of these two 3-digit numbers?

Accepted Answer

A) 221

Answer

B) 289

Answer

C) 238

Answer

D) 357

Question 8

What is the minimum total number of stacks required?

Accepted Answer

A) 14

Answer

B) 12

Answer

C) 16

Answer

D) 18

Question 9

What is the sum of these two numbers?

Accepted Answer

A) 105

Answer

B) 90

Answer

C) 120

Answer

D) 135

Question 10

What is this smallest fractional value?

Accepted Answer

A) 30/7

Answer

B) 15/7

Answer

C) 30/14

Answer

D) 60/7

Question 11

How many such valid pairs of numbers can be formed?

Accepted Answer

A) 3

Answer

B) 4

Answer

C) 2

Answer

D) 5

Question 12

If they ring together now, after how many hours will they ring together next?

Accepted Answer

A) 3 hours

Answer

B) 6 hours

Answer

C) 9 hours

Answer

D) 12 hours

Question 13

What is the minimum number of tiles needed to completely pave this floor?

Accepted Answer

A) 4290

Answer

B) 4160

Answer

C) 4340

Answer

D) 4420

Question 14

What is the sum of the digits of the greatest possible value of N?

Accepted Answer

A) 4

Answer

B) 5

Answer

C) 6

Answer

D) 8

Question 15

What is the value of this number?

Accepted Answer

A) 84

Answer

B) 132

Answer

C) 96

Answer

D) 108