Quantitative Aptitude - Arithmetic Ability Questions

The surface area of a sphere is 1386 cm2.  Find its diameter (in cm)

What is the value of Cot 45° + Cosec 60°?

If a + b = 10 and ab- 13 = -ba - 11, then what is the value of 3ab + 4a2 + 5b2 ?

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 16854, and Rs 17865.24 respectively, what is the rate of interest?

A shopkeeper offers 15% discount on all plastic toys. He offers a further discount of 4% on the reduced price to those customers who pay cash. What does a customer have to pay (in Rs) in case for a toy of Rs 200?

Find the unit digit in the given product (4211)102 x (361)52.

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

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