A bank offers 10% compound interest per half year. A customer deposits Rs. 2000 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is
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The ratio of marks obtained by a student was 1:2:3. The school decided to allow grace marks of 5% for each subject. Find the student's new ratio.
What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?
If XY = a+23 and YX = 13, then find the value of X2 + Y2X2 - Y2.
If tan2A + cot2A + 2 = x, then the value of x is
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In the given figure, the angle bisectors of B and C of an isosceles triangle intersect at point O. Find the angle BOC (in degree), when ∠ABC = ∠ACB = 75°.
If √x - √y = 1 , √x + √y = 17 then √xy = ?