Page 169 - New Medley 5 Semester 1

B. Solve the following word problems.
1. Find the smallest number which is exactly divisible by 3, 6 and 8.

2. Find the greatest number which divides 52 and 65 without leaving a
remainder.

3. Find the smallest number which when divided by 4, 8 and 10 leaves 3

as the remainder in each case.

4. What is the least number of chairs that can be arranged in rows of 14
or 21?

5. Two bells ring at an interval of 30 minutes and 36 minutes. They ring
simultaneously at 7:00 a.m. When will they ring simultaneously again?

6. From a sheet of chart paper with size 48 cm × 30 cm, squares of the

same size are to be cut. Find the least possible number of squares.

7. The product of the LCM and HCF of two numbers is 640. If one number
is 40, find the other number.

8. The product of two numbers is 2535 and their HCF is 65. Find the LCM

of the two numbers.

9. Find the largest 3-digit number that can be divided by 6, 8 and 12
exactly.

10. Can the LCM and HCF of two numbers be 120 and 24 respectively?
Justify your answer.

MATHS LAB ACTIVITY • Experiential Learning

Aim: To find the HCF of two given numbers.

Materials: Chart papers of two colours, a paper cutter and a pencil.

Method: Let us find the HCF of two numbers, say 15 and 24.

1. Take a chart paper (say, red) and cut a strip of length 24 cm and width
2 cm from it.

2. Take another chart paper (say, yellow) and cut a strip of length 15 cm and
width 2 cm from it.

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