71.
Which one of the following numbers is not a square of any natural number ?

72.
The fractions $$\frac{1}{3}{\text{,}}\frac{4}{7}$$ and $$\frac{2}{5}$$ written in ascending order given by -

73.
If 17200 is divided by 18, the remainder is -

74.
Given that, three numbers are such that the second number is twice the first and thrice the third. Also the average of the three numbers is 44. then the difference of the first and the third is :

75.
A number is doubled and 9 is added, If the resultant is tripled, it becomes 75. What is the number ?

76.
A number of boys raised Rs. 400 for a famine relief fund, each boy giving as many 25 paise coins as there were boys. The number of boys was -

77.
The greatest whole number, by which the expression n4 + 6n3 + 11n2 + 6n + 24 is divisible for every natural number n , is -

78.
The sum of all natural numbers from 75 to 97 is -

79.
If $$\frac{4}{5}$$ of an estate be worth Rs. 16800, then the value of $$\frac{3}{7}$$ of it is -

80.
Which of the following number is not divided by 18 ?

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