Quantitative Aptitude - Arithmetic Ability Questions

Calculate the area (in cm2 ) of a circle of radius 10.5 cm.

In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts were

If 3x2 = 102 - 52, find the value of x?

What is the value of [(sin 7x – sin 5x)÷(cos 7x + cos 5x)] – [(cos 6x – cos 4x)÷(sin 6x + sin 4x)]?

In the following question, four number pairs are given. The number on left side of (–) is related to the number of 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.

Select the odd word/letters/number/number pair from the given alternatives.

Calculate the area (in cm2) of a circle of radius 17.5 cm.

If x, y, z are the three factors of a3 -7a - 6, then value of x+y+z will be