Quantitative Aptitude - Arithmetic Ability Questions

If in-radius of an equilateral triangle is 3 cm. Calculate the perimeter (in m) of the equilateral triangle.

If 3cos2x - 2sin2x = -0.75 and 0°⩽ x ⩽ 90°, then x = ?

8 x {5 - (-2) x (-3)} = ?

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

Four pairs of words are given. Find the odd one out.

If tanα = 2 - 1, then the value of  tanα - cotα = ?

If n + n2 + n4 + n8 = 45, then find the value of 'n' which will satisfy the equation.

If two complimentary angles are in the ratio of 11 : 7, find the smaller angle.