Mathematics
Grade-4-
Easy
Question
Sum of prime numbers between 2 and 11 is___________.
- 11
- 15
- 20
- 8
Hint:
A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.
The correct answer is: 15
We have to find the sum of the prime between 2 and 11.
The prime numbers between 2 and 11 are 3, 5, and 7.
So, 3+5+7 = 15.
Hence, the correct option is B.
A prime number is a number which is divisible by 1 and the number itself.
Related Questions to study
MathematicsVideo
9 × 
= 27
According to table of 9.
9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
Therefore, 9 × 3 = 27
The correct option is (c) 3.
9 × = 27
MathematicsGrade-4-
According to table of 9.
9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
Therefore, 9 × 3 = 27
The correct option is (c) 3.
MathematicsVideo
From the following which number is not a prime number.
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.
From the following which number is not a prime number.
MathematicsGrade-4-
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.
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.
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