Q1) Area of three fields is  and  respectively. In each of the fields a flower bed of equal length has to be made. If flower bed in each of the fields is 3 m wide then what is the maximum length of the flower bed in each of the fields?

  1. 7 m
  2. 9 m
  3. 5 m
  4. None of these

Q2) A merchant has three different kinds of milk - 435 litres, 493 litres and 551 litres. Find the least number of caks of equal size required to store all the milk without mixing.

  1. 51
  2. 61
  3. 47
  4. 45

Q3) How often will five bell toll together in one hour if they start together and toll at intervals of 5, 6, 8, 12, 20 seconds respectively?

  1. 29
  2. 30
  3. 31
  4. 120

Q4) The traffic lights at three different road crossings change after every 48 s, 72 s and 108 s respectively. If they all change simultaneously at 8:20:00 h, then they will again change simultaneously at:

  1. 8:27:12 h
  2. 8:27:24 h
  3. 8:27:36 h
  4. 8:27:48 h

Share workings for each question. Don't just share the answers. 

Comments

user profile image

HCF of 165,195 & 285 is 15 

Max area of flower bed = 15sqm

Max length if Breadth is 3 m = 15/3 = 5m

Ans B

1
user profile image

HCF of 435,493,551 = 29

So Reqd No of Containers = 435+493+551/29 = 51 

Option A

2
user profile image
Mechanical Engineer by education, Entrepreneur by heart. Day by day nothing is changing but when we look behind, everything is different.

You are right about finding the LCM. Send your effort for 1 and 2.

0
user profile image

3. LCM of 5,6,8,12,20= 120 option d

4. LCM of 48,72,108 = 432secs or 7.2 mins  so option a

Not getting q1 and 2

2