11. If the sum of onethird and onehalf of a number exceeds twothird of a number by 5, the number is 


12. If 10 is subtracted from twothird of a number the result is equal to sum of 40 and onethird of the number, then find the number. 


13. If the sum of a number and its square is 132, then what is the number? 


14. Twenty times a positive integer is more than its square by 96, then the positive integer is 


15. The thrice the square of a natural number is decreased by 8, the number is equal to 100 more than the number. 


16. The sum of a number and its reciprocal is onefifth of 26. What is the sum of that number and its square. 


17. Find a positive number, which when increased by 8 is equal to 128 times reciprocal of the number. 


18. The product of two natural numbers is 19. The sum of the reciprocal of its square is 


19. The product of two natural numbers is 19. The sum of the reciprocal of its square is 


20. Three numbers are in the ratio 4 : 5 : 6 and their product is 76680. the largest number is 


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