Problems on Numbers, Numbers MCQ Questions

Problems on Numbers, Numbers MCQ Questions

1-The sum of two numbers is 40 and their difference is 4. Then the ratio of the two numbers is

(A) 11:9

(B) 11:17

(C) 20:19

(D) 21:5

 

2-The approximate standard deviation of 10 natural numbers is

(A) 2.57

(B) 2.67

(C) 2.77

(D) 2.87

 

3-Sum of three consecutive integers is 45. Find the integers.

(A) 13, 14, 15

(B) 14, 15, 16

(C) 15, 16, 17

(D) 16, 17, 18

 

4-Simplify 5√3 + 18√3 – 2√3

(A) 11√3

(B) 12√3

(C) 18√3

(D) 21√3

 

5-The sum of a number and its reciprocal is 6(1/6). Find the numbers.

(A) 5, 1/4

(B) 6, -5

(C) 6, 1/6

(D) 5, -1/5

 

6-Which of the following is not a prime number?

(A) 240

(B) 335

(C) 391

(D) 575

 

7-Simplfy 2/3 of [5(1/6) – 4(3/8)]

(A) 1/3

(B) 19/36

(C) -5/17

(D) -7/9

 

8- The sum of the digits of a two digit number is 15 and the difference between the digits is 3. What is the two digit number?

(A) 68

(B) 78

(C) 85

(D) 96

 

9- The sum and product of two numbers are 12 and 35 respectively. What is the sum of their reciprocals?

(A) 11/35

(B) 12/35

(C) 13/35

(D) 14/35

 

10-The least perfect square number which is divisible by 3, 4, 5, 6 and 8 is

(A) 900

(B) 1200

(C) 2500

(D) 3600

 

ANSWERS:

1-(A), 2-(D), 3-(B), 4-(D), 5-(C), 6-(C), 7-(B), 8-(D), 9-(B), 10-(D)