A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number ?
Let the number be v. Then, 3 (2x + 9) = 75.
2x + 9 = 25
=> 2x = 16
=> x = 8
A positive number when decreased by 4, is equal to 21 times the reciprocal of this number. The number is
How many numbers are there from 200 to 800 which are neither divisible by 5 nor by 7?
How many natural numbers less than 500, when divided by 35 and 49, will leave a remainder of 30 in each case?
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If the given number 925x85 is divisible by 11, then the smallest value of x is:
What x is added to each of 10, 16, 22 and 32, the numbers so obtained in this order are in proportion? What is the mean proportional between the numbers (x + 1) and (3x + 1)?
When a positive integer is divided by d, the remainder is 15. When ten times of the same number is divided by d. the remainder is 6.The least possible value of d is:
The greatest number which should be replace '*’ in the number 146*48 to make t divisible by 8 is:
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