Mathematics
Grade-4-
Easy
Question
From the following which number is not a prime number.
- 9
- 11
- 13
- 17
Hint:
A natural number which has exactly two factors, i.e. 1 and the number itself, is a prime number.
The correct answer is: 9
Check every option for prime number.
We can see that only option (a) has more than two factors.
Therefore, 9 is not a prime number.
The correct option is (a) 9.
Related Questions to study
MathematicsVideo
The L.C.M. of 50 and 60 is___________.
Step 1: Find the prime factors of 50 and 60.
50 = 2 x 5 x 5
60 = 2 x 2 x 3 x 5
Step 2:
LCM = 2 x 5 x 5 x 2 x 3
LCM = 300
The correct option is (b) 300.
The L.C.M. of 50 and 60 is___________.
MathematicsGrade-4-
Step 1: Find the prime factors of 50 and 60.
50 = 2 x 5 x 5
60 = 2 x 2 x 3 x 5
Step 2:
LCM = 2 x 5 x 5 x 2 x 3
LCM = 300
The correct option is (b) 300.
Mathematics
Tell the time the clock shows.
Tell the time the clock shows.
MathematicsGrade-1
Mathematics
Find the time the clock shows.
Find the time the clock shows.
MathematicsGrade-1
Mathematics
Choose the clock which shows the time 9 o’clock.
Choose the clock which shows the time 9 o’clock.
MathematicsGrade-1
Mathematics
Which clock shows the time as 11 o’clock?
Which clock shows the time as 11 o’clock?
MathematicsGrade-1
Mathematics
Danny starts playing a cricket match one hour after 5 o’clock. What time did he start playing the match?
Danny starts playing a cricket match one hour after 5 o’clock. What time did he start playing the match?
MathematicsGrade-1
Mathematics
Simon likes to read after 4o’clock and before 6o’clock which clock shows the time Simon might read?
Simon likes to read after 4o’clock and before 6o’clock which clock shows the time Simon might read?
MathematicsGrade-1
Mathematics
The one hour before of 8 o’clock is _____.
The one hour before of 8 o’clock is _____.
MathematicsGrade-1
Mathematics
Two hours after 10 o’clock is _____.
Two hours after 10 o’clock is _____.
MathematicsGrade-1
Mathematics
John starts playing drums at 10 o’clock. He plays continuously one hour. At what time he finished playing drums.
John starts playing drums at 10 o’clock. He plays continuously one hour. At what time he finished playing drums.
MathematicsGrade-1
Mathematics
Lisa rides her bike after 6 o’clock before 8 o’clock. Choose the clock that shows the time Lisa might ride her bike.
Lisa rides her bike after 6 o’clock before 8 o’clock. Choose the clock that shows the time Lisa might ride her bike.
MathematicsGrade-1
Mathematics
1 hour before 1 o’clock is ____.
1 hour before 1 o’clock is ____.
MathematicsGrade-1
Mathematics
1 hour before 12 o’clock is ____
1 hour before 12 o’clock is ____
MathematicsGrade-1
Mathematics
The music concert starts at 10 o’clock and it ends after one hour. At what time the music concert ends?
The music concert starts at 10 o’clock and it ends after one hour. At what time the music concert ends?
MathematicsGrade-1
Mathematics
Bill says the clock shows 3 o’clock. Benny says the clock shows 12 o’clock. Do you agree?
Bill says the clock shows 3 o’clock. Benny says the clock shows 12 o’clock. Do you agree?
MathematicsGrade-1
