Express each number as product of its prime factors :

Solution:

(i) 140



So, $140=2 \times 2 \times 5 \times 7=2^{2} \times 5 \times 7$

(ii) 156



So, $156=2 \times 2 \times 3 \times 13=2^{2} \times 3 \times 13$



So, $3825=3^{2} \times 5^{2} \times 17$

(iv) 5005



So, $5005=5 \times 7 \times 11 \times 13$

(v) 7429



So, $7429=17 \times 19 \times 23$