Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 3 and a2+b2=25, then the value of ab is

PQ and RS are common tangents to two circles intersecting at A and B. AB, when produced both sides, meet the tangents PQ and RS at X and Y, respectively. If AB = 3 cm, XY = 5 cm, then PQ (in cm) will be

If sinA + sin2A =1 then what is the value of cos2A + cos4A

The mean of a distribution is 21 and the standard deviation is 7. What is the value of the coefficient variation?

If 90% of A = 30% of B and B = x% of A, find x.

Weight of A and B are in the ratio 11 : 8. A’s weight increases by 40% and the total weight of A and B increases by 30%. What is the percentage increase in the B’s weight?

If the product of two numbers is 2522 and their LCM is 97 then their HCF is

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