Quantitative Aptitude - Arithmetic Ability Questions

A certain sum of money becomes 4 times of itself in 30 years at a rate of simple interest. In how many years it will become double of itself at the same rate of simple interest?

If the measures of the angles of a triangle are in the ratio. 1:2:3 and if the length of the smallest side of the triangle is 10cm, then the length of the longest side is

tanAcosec2A is equal to

If cos 21° = x/y, then cosec 21° -­ cos 69° is equal to

If x2 – 4x + 1 = 0, then what is the value of x9 + x7 – 194x5 – 194x3?

The value of tan 315° cot (­ -405° ) is equal to

The price of an article is cut by 31%, to restore to its original value, the new price must be increased by

Find the LCM of 12, 16, 20 and 24.