Important Questions Mathematics for competitions
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January 23, 2016 |
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- An ogive in used to determine
(a) mean (b) median (c) mode (d) none of these .
2 In a ∆ABC,D and E are points on the sides AB and AC
respectively such that DE//BC .If AD=2.5cm, BD=3.0 cm and AE = 3.75cm,
then AC =
(a)
7.25 cm b) 8.25 cm (c) 8.75 cm (d)
none
3 If the sum of ages of father and his son is 65 years
and twice the difference of their ages is 50 years, then age of father is
(a)
45 (b) 40 (c) 50 (d) 155
4 If the length of the corresponding sides BC and QR of
two similar triangles ABC and PQR are respectively 6cm and 10cm, then the
ratio of the areas of ∆ABC and ∆PQR is
(a)
3:5 (b) 9:25 (c)
25:9 (d) 5:3
5. The average of 11 results is 50. If
the average of the first six result is 49 and that of the last six is 52, then
the sixth result is
(a) 53 (b) 54 (c) 55 (d)
56
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