Quantitative Aptitude - Arithmetic Ability Questions

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What is the value of 13×7+17×11+111×15+...+1899×903 ?

A sum of Rs 20000 becomes Rs 32000 in 12 years, when invested in a scheme of simple interest. If the same sum is invested in a scheme of compound interest with same yearly interest rate (compounding of interest is done yearly), then what will be the amount (in Rs) after 2 years?

(secA - 1)/(secA + 1) is equal to?

The product of two numbers is 0.432. One of the numbers is 1.6. What is the other number?

Three solid spheres of radius 3 cm, 4 cm and 5 cm are melted and recasted into a solid sphere. What will be the percentage decrease in the surface area?

In a triangle ABC, AD is angle bisector of ∠A and AB : AC = 3 : 4. If the area of triangle ABC is 350 cm2, then what is the area (in cm2) of triangle ABD?

If X2+4y2+z2-4x-2z+5-0, then find the value of y15+x5z14