Quantitative Aptitude - Arithmetic Ability Questions

The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

An article is listed at Rs 2375. A man purchases it at two successive discounts of 50% and 25% and spends Rs 165 on repairing of article. If he sells thearticle at a profit of 62.5%, then what is the selling price (in Rs) of the article?

Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?

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?

5% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

If 3A = 2B = C, then A : B : C = ?

LCM of two co-prime numbers a and b is (a is greater than b):

If (1 + secA)/tanA = x, then x is