Q15 of 180 Page 2

If ∆ABC ∆PQR with is equal to _____.

Given: In ∆ABC ∆PQR and

By area property of similar triangles, the ratio of the areas of two similar triangles is equal to square of the ratio of their corresponding sides.

The value of (tan 1.tan 2.tan 3° …… tan 89°) is ____________ .

If A, B, C, are the interior angles of a triangle ABC, prove that

The quadratic equation has _______ roots.

The pair of linear equations 2x + 4y = 3 and 12y + 6x = 6 has/have _______ solutions/s.

Given that HCF (306, 657) = 9, find LCM (360, 657).

100m RACE A stopwatch was used to find the time that it took a group of students to run 100 m.

a. Estimate the mean time taken by a student to finish the race.

(i) 54

(ii) 63

(iii) 43

(iv) 50

b. What will be the upper limit of the modal class?

(i) 20

(ii) 40

(iii) 60

(iv) 80

c. The construction of cumulative frequency table is useful in determining the

(i) Mean

(ii) Median

(iii) Mode

(iv) All of the above

d. The sum of lower limits of median class and modal class is

(i) 60

(ii) 100

(iii) 80

(iv) 140

e. How many students finished the race within 1 minute?

(i) 18

(ii) 37

(iii) 31

(iv) 8