Quantitative Aptitude - Arithmetic Ability Questions

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Find equation of the perpendicular bisector of segment joining the points (2,-5) and (0,7)?

In the given series, how many 8s are there that are not divisible by the number to its left but completely divisible by the number to its right.

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The average monthly salary of 19 members of a group is Rs. 16000. If one more members whose monthly salary is Rs. 20000 has joined the group, then the average salary of the group is

The average weight of P, Q and R is 71 kg. If the average weight of P and Q be 66 kg and that of Q and R be 76.5 kg, then the weight (in kg) of Q is.

The average of 7 numbers is 30. If the average of first three numbers is 25 and that of last three numbers is 35, then what is the fourth number?

If 1+y16-74, then the value of 5y-15

The perimeter of two similar triangles ABC and PQR are 36 cms and 24 cms respectively. If PQ = 10 cm then the length of AB is