Problems On Numbers1





In this page "problems on numbers1", we are going to have some practice problems on numbers which are usually asked in SAT exam and other competitive exams.By practicing these problems, students can improve their aptitude skills as well as they can know the time consumption for SAT exam & other competitive exams.


1.The average of first five multiples of seven will be.

(A)   15
(B)   21
(C)   35




2.The median of first nine multiples of 3 will be.



(A) 15
(B) 23
(C) 29




3. If the sum of two numbers is 60 and their difference is 5, the difference between their squares will be.



(A) 300
(B) 500
(C) 450




4.The difference between the largest four digit number and the smallest four digit number will be.



(A) 8999
(B) 9999
(C) 8569




5.The largest number,which divides (292 - 21 2 ) completely will be.



(A) 580
(B) 460
(C) 400




6.A number is multiplied by 9 and then 9 is added to it. If such a number is completely divisible by 1, the smallest number will be.



(A) 13
(B) 16
(C) 18




7.What is the difference between the smallest four digit number and the difference between the smallest four digit number and the largest three digit number?



(A) 100
(B) 105
(C) 101




8.The number of prime factors in the expansion of (6) 10 x (7) 17 x (5) 55 x (11) 111 is .



(A) 210
(B) 215
(C) 203



9. If an even number is completely divisible by 9, the number will also be divided by which of the set of numbers?



(A) 2,3,6, and 18
(B) 3,6,9, and 12
(C) 5,10,15, and 25



10.If a two digit number is K times the sum of its numerals. How many times the number with reversed numerals will be of the sum of its numerals?



(A) 11 - K
(B) 10 - K
(C) 15 - K




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Answers

1. 21

2. 15

3. 300

4. 8999

5. 400

6. 16

7. 101

8. 203

9. 2,3,6, and 18

10. 11 - K






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