Qu. 1. Find LCM of
a. 18 & 12
b. 32 & 18
Qu. 2. Find HCF of
a. 22 & 62
b. 66 & 72
Qu. 3. If LCM & HCF of two numbers are 36 & 6 respectively then what is the product of two numbers?
A. 180
B. 196
C. 216
D. 246
Qu. 4. Three Traffic signals at road crossing change after duration 40, 62, 78 seconds each. If they start changing at time 11 AM then at what time all three will be changing simultaneously.
A. 11 Am 48 min
B. 12 PM 18 min
C. 12 PM 28 min
D. 1 PM 36 min
Qu. 5. Three athletes A, B & C starts race around circle with perimeter 12 km at 9 AM. A runs at 6 km/hr while B & C at 4 km/hr & 3 hr respectively. At what time they will meet again ?
A. 10 PM
B. 12 PM
C. 9 PM
D. 11 AM
Answers:
- a: 36 b: 288
- a: 2 b: 6
- C
- B
- C