SECTION-C (Question No 13 and 14 carry 3 marks each) O 13. Simplify: Xy - [yz - ZX-{yx-(3y -xz) - (xy-zy)} 14. By how much should 23.745 be increased to get 50 ? SECTION-D (Question No 15 and 16 carry 4 marks each) 15. Draw a line segment PQ=6.2cm. Draw the perpendicular bisector of PQ. 16. A man is thrice as old as his son. Five years ago the man was four times as old as his son. Find their present ages. a
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question 13 solution is given above
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