Quantitative Aptitude - Arithmetic Ability Questions

What is the length of diagonal, if area of a rectangle is 168 sq.cm and breadth is 7 cm?

If x = (a/b) + (b/a), y = (b/c) + (c/b) and z = (c/a) + (a/c), then what is the value of xyz – x2 – y2 – z2?

An angle is greater than its complementary by 20°. What will be the measure of the angle?

PQR is a right angled triangle in which ∠R = 90°. If RS ⊥ PQ, PR = 3 cm and RQ = 4 cm, then what is the value of RS (in cm)?

The triangle ABC and DEF are similar to each other. The measure of the angle A and E is 67 and 83 degree respectively. What is the value of angle C?

If three successive discounts of 20%, 30% and 40% are given, then what will be the net discount (in percentage)?

The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?

Find out the odd word/letters/number/number pair from the given alternatives.