Quantitative Aptitude - Arithmetic Ability Questions

Sonam's age after eight years will be half of her father's age. Eight years ago the ratio of their ages was 1 : 3. Find the present age of Sonam's father.

Find the greatest number among 213, 312, 1, 516

The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?

The lengths of the two diagonals of a rhombus are 8 cm and 15 cm respectively. Find its area (in cm²).

What is the reflection of the point (5, -2) in the line x = -1?

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

Marked price of an item is Rs 300. On purchase of 2 items discount is 24%, on purchase of 5 items discount is 38%. Rachna buys 7 items, what is the effective discount?

If (cotAcotB - 1) / (cotB + cotA) = x, then the value of x is