Page 168 - New Medley 5 Semester 1

Solution: Here, we need to find the HCF of numbers 72 and 132.
Using division method,

72 132 1
–72

60 72 1
–60

12 60 5
–60

0

Thus, HCF of 72 and 132 = 12

Hence, the maximum 12 apples can be put in each row.

Example 10: Three kinds of biscuits are bought for `8, `12 and `15

each. Find the least amount of money by which we can
buy an exact number of biscuits of each kind.

Solution: Here, we have to find the LCM of 8, 12 and 15. Using the
common division method,

∴ LCM = 2 × 2 × 3 × 2 × 5 = 120

Thus, we can buy each kind of biscuits in an exact number
worth `120.

EXERCISE 3.6

A. Complete the following table.

S.No. First Number Second Number HCF LCM

1. 12 6 156

2. 63 7 315

3. 54 90 18

4. 150 250 750

5. 144 216

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