Three brands A, B and C of biscuits are available in packets of 12, 15 and 21 biscuits respectively. If a shop keepeer wants to buy an equal number of biscuits, of each brand, what is the minimum number of packets of each brand, he should buy?

Question

Philoid · Accepted Answer

Number of biscuits of brand A that can be bought will be a multiple of 12

Number of biscuits of brand B that can be bought will be a multiple of 15

Number of biscuits of brand C that can be bought will be a multiple of 21

Since, shopkeeper wants to buy an equal number of biscuits of each brand

That number should be divisible by 12, 15, 21

Least such number = LCM of 12, 15, 20 = 420

Hence, minimum number of biscuits of each brand shopkeeper has to buy = 420