Number Systems Quiz 4 February 10, 2012 by kumar 1. If a*b=(a+2)^2.(b-2),then the value of (7*5) is A. 343B. 456C. 243D. 123 2. √5-√3,√13-√11 and √7-√5 which is the largest number A. √5-√3B. √11-√5C. √7-√9D. √7-√5 3. A number exceeds its 3/5 th by 14 .What is the number?A. 45B. 65C. 35D. 75 4. (4)^11x(7)^5x(11)^2,the total number of prime factors A. 5B. 7C. 10D. 20 5. If x is any positive integer,then (3^4x-4^3x)is always divisible by A. 17B. 16C. 15D. 19 6. If the digit 1 is placed after a number whose hundreds,tens and unit digits are 7,4 and 5 respectively.The difference between the new and the old number is A. 5670B. 6706C. 3409D. 1245 7. When 30% of one number is added to another number ,the second number increases by 1/5th.What is the ratio of the first number of the second number?A. 3:4B. 2:3C. 6:7D. 4:5 8. A number is divided by 8,the remainder is 6 and when the same number is divided by 7, the remainder is 5,Find the number?A. 44B. 67C. 54D. 76 9. In 4 numbers,the average of first three numbers is 15 and that of last three is 16.If the last number is 19,the first is A. 23B. 16C. 19D. 15 10. The value of B when 583402B is divisible by 8A. 8B. 2C. 0D. 4 11. The sum of 1+3+5+.........+25 is A. 625B. 786C. 325D. 125 12. Two numbers ratio is 11:13.If 12 is subtracted from each,the remainders are in the ratio of 7:9.The numbers are A. 45,49B. 32,39C. 23,29D. 33,39 13. The number of prime numbers between 1 and 100(both exclusive)is A. 34B. 23C. 45D. 10 14. If a and b are integers such that (3a+b) is a multiple of 11,then which of the following is also divisible by 11 A. 10a+3bB. 9a+3bC. 2a+5bD. 5a+3b 15. if the sum of the digits of any number lying between 100 and 1000,is subtracted from the number the difference is always divisible by A. 9B. 3C. 1D. 6 Related posts: Number Systems Quiz 1 Number Systems Quiz 2 Number Systems quiz 3