Quantitative Aptitude - Arithmetic Ability Questions

If the side of the equilateral triangle is 8√3 cm, then what is the length (in cm) of the in radius of the triangle?

Reflection of the point (­2,5) in the x­ axis is

Simplify 50 + 18 - 8

Two circles touch each other at point X. Two common tangents of the circles meet at point P and none of the tangents passes through X. These tangents touch the larger circle at points B and C. If the radius of the larger circle is 15 cm and CP = 20 cm, then what is the radius (in cm) of the smaller circle?

The sum of two digits of a number is 10. If the digits are interchanged, then its value increases by 18. Find the number.

If a2+1=a, then the value of a3 is

In a triangle the length of the side opposite the right angle is 6 cm, what is the length of the side opposite to the angle which measures 30°?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.