Problems On Numbers





In this page "problems on numbers", we are going to see 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.Three numbers are in the ratio 4:5:6. The sum of the smallest and the largest number is equal to the sum of the first number and 48. What will be the value of smallest number?

(A)   45
(B)   32
(C)   87



2.What will be the difference between the average of first 20 odd numbers and the average of the first 20 even numbers?



(A) 1
(B) 5
(C) 6



3.The sum of two odd numbers is



(A) Always an even number
(B) Always an odd number
(C) Often an even number



4.Which of the following numbers cannot be a unit numeral of a whole number?



(A) 8
(B) 4
(C) 5



5.What is the difference between the individual and local values of numeral 9 in the number 9456?



(A) 8891
(B) 9891
(C) 8991



6.The sum of first 50 numbers of the series 7+9+11+............... is



(A) 1000
(B) 2800
(C) 10000



7.The smallest number,which is when added to 7801, gives a whole square, is



(A) 90
(B) 110
(C) 120



8.a + b + c + d is a positive number and a,b,c and d all are positive integers and x is the smallest integer than these four numbers. What will be the value of x?



(A) 0
(B) 5
(C) 1



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



(A) 21
(B) 19
(C) 6



10.If the sum of four subsequent numbers is 266, What will be the value of first number?



(A) 65
(B) 15
(C) 80



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Answers

1. 32

2. 1

3. Always an even number

4. 8

5. 8991

6. 5

7. 120

8. 1

9. 21

10. 65



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