Question

1. Find the HCF of 144 and 198.
2. The median and mode respectively of a frequency distribution are 26 and 29. Then find its mean.
3. In the given fig., on a circle of radius 7 cm, tangent PT is drawn from a point P such that PT = 24 cm. If
O is the centre of the circle, then find the length of PR.
11
R
OR
The diameter of a wheel is 1.26 m. What the distance covered in 500 revolutions ?
4. Find the probability that a number selected at random from the numbers 1, 2, 3, ...., 15 is a multiple
of 4.
5. If one zero of a quadratic polynomial (12 + 3x + k) is 2, then find the value of k.
OR
If one of the zeroes of the quadratic polynomial (k – 1) 2+ k + 1 is - 3, then find the value of k



write answer property।​

Answer 1

HCF of 144 and 198 is 18. Solution: The largest number which divides the given two or more numbers exactly is known as Highest Common Factor. In given problem 18 is the HCF which divides the numbers 144 and 198 exactly.

thus the answer is 18 and

2nd Here we can use direct formula,

3×Median−2×Mean=Mode

3×26−2×Mean=29

78−29=2×Mean

Mean=249

Mean=24.5