A number is divisible by 2 and 3 is also divisible by………….
a) 4
b) 6
c) 8
d) 9
The least number among the common multiples of 6 and 5 is…………………
a) 6
b) 5
c) 15
d) 30
Solution:
6 multiple =6, 12, 18, 24, 30, 36, 42……......
5 multiple =5, 10, 15, 20, 25, 30, 35……......
Least common multiple = 30
LCM of two prime numbers is their……
a) Sum
b) Difference
c) Product
Solution: for example we have two prime numbers like 3 and 5. When we find the LCM of this numbers then we multiply both because it has no other factors then 1. (5×3=15)
The smallest number divisible by 2, 3 and 5 is…
a) 15
b) 60
c) 30
d) 20
Find the HCF of 22, 33, and 55?
a) 11
b) 22
c) 33
d) 44
Solution: you can easily solve it according to HCF above discussed method.
What are the longest equal pieces into which three ropes of 42m, 48m, and 54m length, can be cut?
a) 9
b) 12
c) 6
d) 18
Solution: Longest, biggest, maximum, highest
نوٹ: اس طرح کے سوالات میں ایک بات نوٹ کرلیں یاد دہانی کے لئے کہ جس سوال میں یہ الفاظ نظر آئے تو فوراHCF کے زریعے سے حل کیا کریں
