Quantitative Aptitude - Arithmetic Ability Questions

Determine the value of  'a' which satisfies the equation 9a + 40a = 41a

Faiyaz's birthday is on Wednesday 12th April. On what day of the week will be Shray's Birthday in the same year if Shray was born on 2nd October?

What is the average of first 19 odd numbers?

If 310 × 272 = 92 × 3n then the value of n is

What is the value of [12/(√5 + √3)] + [18/(√5 – √3)]?

If O is the orthocentre of a triangle ABC and ∠BOC = 100°, the measure of ∠BAC is

If Rs 7,800 is to be divided between A, B and C in the ratio 1/2 : 1/3 : 1/4, then how much share will B get (in Rs)?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?