Quantitative Aptitude - Arithmetic Ability Questions

If a2+1=9a, (a≠0) then the value of a2+1a2 is

If a + b = 17 and a - b = 9 then the value of (4a2 + 4b2) is,

If the length of the shadow of a vertical pole be √3 times the height of the pole, the angle of elevation of the sun is:­

The ratio of the present ages of Reena and her husband is 4 : 5. 8 years from now, ages of her husband and her son will be in the ratio 24 : 9. If the present age of Reena is 32 years, then what will be her son’s present age (in years)?

Incentre of Δ ABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠AIC is

Munni can bake 70 cakes in 7 hours, Munni and Guddi together can bake 90 cakes in 6 hours. How many cakes Guddi can bake in 10 hours?

Which of the following is NOT prime number?

Select the odd letters from the given alternatives.