Question
The sum of digits of a two-digit number is 10. When the
digits are reversed, the number decreases by 54. Find the changed number.Solution
Let the unit digit =x and tens =y 10y + x After reversed digit =10x+y ATQ- 10x+y-10y-x =54 9x -9y =54. x-y =6 x + y =10 x =2, y =8. Original number =82 Change number =28.
A cone has a base radius of 6 cm and a height of 8 cm. Find its volume and slant height (use π = 3.14).
120Â Â 124Â Â 151Â Â 167Â Â Â 292Â Â Â ?
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The simplified value of (452 x 452 x 452 – 356 x 356 x 356)/(452 x 356 + 452 x 452 + 356 x 356) is:
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In the figure, ABCD is a cyclic quadrilateral with O as center of the circle If ∠BOC = 136°, find ∠OBC.
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