Question

ample 4. Observe the pattern in the following
31 x 39 = 13 x 93. The two numbers on each side are coprime and are obtained by
reversing the digits of respective numbers. Write two pairs of such numbers
lution. One pair is 31 x 26 = 13 x 62
Another pair can be 23 x 96 = 32 x 69
ample 5. Find the prime factors of 1729. Arrange the factors in ascending order and
find the relation between two consecutive prime factors
dution. Let us factorise by division method
7 1729
.. 1729 = 7 x 13 x 19
13 247
The prime factors of 1729 are 7, 13, 19.
19
Obviously, the difference between two given consecutive prime
factors is 6.
xercise 4.3
Find prime factorisation of each of the following numbers. Use exponential
notation where possible:
1. 150
2. 756
3. 1056
4. 3969 5. 13500
6. Write the smallest and the greatest 3-digit numbers and express them as product
of primes.
7. Find who I am?​

Answer 1

Answer:

ample 4 . place of number is get exchanged. like31×39=13×93