What is the sum of all the prime numbers from 20 to 40?

Number System
What is the sum of all the prime numbers from 20 to 40?

120

118

119

117

120

118

119

117

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Number System
On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

43

47

41

45

43

47

41

45

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Number System
The sum of two numbers is 25 and their difference is 13. Find their product.

325

315

114

104

325

315

114

104

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Number System
What should come in place of question mark (?)? 8 : 1 1 : : 72:

99

89

79

109

99

89

79

109

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Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

21 years

25 years

18 years

15 years

21 years

25 years

18 years

15 years

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Number System
A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15?

11

9

1

13

11

9

1

13

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number System

Number System What is the sum of all the prime numbers from 20 to 40?

Number System On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

Number System The sum of two numbers is 25 and their difference is 13. Find their product.

Number System What should come in place of question mark (?)? 8 : 1 1 : : 72:

Number System The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

Number System A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15?

Number System
What is the sum of all the prime numbers from 20 to 40?

Number System
On a new year eve, every student of a class sends a card to every other student. If the total number of cards delivered is 1980, how many students are there in the class ?

Number System
The sum of two numbers is 25 and their difference is 13. Find their product.

Number System
What should come in place of question mark (?)? 8 : 1 1 : : 72:

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

Number System
A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15?