21. The product of two positive numbers is 11520 and their quotient is $$\frac{9}{5}$$. Find the difference between two numbers.
22. If a and b are odd numbers, then which of the following is even ?
23. The denominator of a fraction is 3 more than its numerator. If the numerator is increased by 7 and denominator is decreased by 2, we obtain 2. The sum of numerator and denominator of the fraction is -
24. The value of $$\left( {99\frac{{95}}{{99}}} \right) \times 99$$ is :
25. A number when divided by 91 gives a remainder 17. When the same number is divided by 13. The remainder will be -
26. Each member of a picnic party contributed twice as many rupees as the total number of members as the the total collection was Rs. 3042. The number of member present in the party was -
27. The value of : $$\left( {1 + \frac{1}{2}} \right)$$ $$\left( {1 + \frac{1}{3}} \right)$$ $$\left( {1 + \frac{1}{4}} \right)$$ ..... $$\left( {1 + \frac{1}{120}} \right)$$
28. It is given that $${\text{(}}{{\text{2}}^{32}} + 1)$$ is exactly divisible by a certain number, which one of the following is also definitely divisible by the same number ?
29. The unit digit of the expression : $${25^{6251}} \, + $$ $${36^{528}} \, + $$ $${73^{54}} = ?$$
30. In an examination, a student was asked find $$\frac{3}{{14}}$$ of a certain number. By mistake he found $$\frac{3}{{4}}$$ of it, his answer is 150 more than the correct answer. The given number is -
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