Quantitative Aptitude - Arithmetic Ability Questions

What is the sum of all natural numbers between 100 and 400 which are divisible by 13?

Which of the following is a reductible fraction?

The value of cos220° + cos270°is

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is

A can make a cupboard in 10 days and B can do it in 50 days. Along with C, they did the job in 6.25 days only. Then in how many days C alone can do the job?

X does 25% of a work in 20 days. Y joins X and they together finish the remaining work in 15 days. Y alone can do the whole work in ___ days.

In the following question, select the odd word pair from the given alternatives

A 8 cm long perpendicular is drawn from the centre of a circle to a 12 cm long chord. The diameter of the circle is