AC frequency of 100 KHz to 100 MHz is required for 

If 1+2+3+...+n = λ then value of 1³+2³+3³+...+n³ = ?

How many two digit numbers are divisible by 13

12 men working for 8 hours a day can complete a work in 90 days. How many days will it take if 8 men working for 12 hours a day to complete the same work

Mean of 5 numbers is 27. If one number is excluded their mean is 25. Find the excluded number.

Which of the following statement(s) is/are true statements(s)

1. All squares are rhombuses also
2. All parallelograms are rectangles also
3. All parallelograms are quadrilaterals also 
4. All trapeziums are rhombuses also