Quantitative Aptitude - Arithmetic Ability Questions

What is the LCM of 64 and 56?

If x=8+215, then what is the value of x+1x?

2 sec2A is equal to

Solution A contains 10% acid and solution B contains 30% acid. In what ratio should solution A be mixed with Solution B to obtain a mixture with 25% acid?

Of the 5 numbers whose average is 72, the first is 1/8 times the sum of other 4. The first number is _____.

If the ratio of the cost price and the selling price of an article be 4:5, then the percentage of profit is:

If 50 less had applied and 25 less selected, the ratio of selected to unselected would have been 9 : 4. So how many candidates had applied if the ratio of selected to unselected was 2 : 1.

If a + b = ­ 8 and a2 + b2 = 34, then value of ab is